Blog Question

You solve solution concentration problems by taking the mass of the solute and divide it by the mass of the solution and multiply it by 100. The tricky part is knowing, which is which and calculating it.

HW #9

C. 5 # 1-3

1. a) The solution is cooled so it becomes a supersaturated solution.
    b)

2. a) and b)

b. This differs because since there is less solution, it is more concentrated.

ii. 25 grams of water must evaporate.



3. a) and b)

c) The b drawing has a higher water level, which makes it is more spread out, but they are both unsaturated.

Blog Question

I looked over the chart to help myself undertant it and i read the required reading that described and explained the chart. I read the questions carefully and found the answers throughout the reading that explain how to solve certain problems.

HW # 8

C.2 #1-3 

1.    a) 100 grams   b) 45 grams

2.    a) 10 grams    b) 20 grams

3.    a) 88 grams   b) 80 grams


1SCS #1-8

1. This is because solutes dissolve more easily in higher temperatures.

2. 48 grams

3. a) 200    b) 710    c) 1,892

4. a) NaCl, KCl, KNO3      b) KNO3, KCl, NaCl

5. A saturates solution is a a solution with substances that are not dissolved. An unsaturated solution is a solution that contains less dissolved solute than the amount that the solvent can normally hold at that temperature

6.        a) 30 grams   B) supersaturated   c) 35 grams

7.        a) The crystal will dissolve in the solution.   b) The crystal will stay undissolved at the bottom of the solution  C) Solid crystals will form and settle to the bottom of the solution

8.  1.5 x 35g = 52.5%

Water Testing Lab

Water Testing Lab

6-25-13

Georgie Dorfman, Ben Cohen, and Charlie Dorfman

Dr. Forman

Abstract:

My team tested for the presence of dissolved calcium, iron, chloride, and sulfate ions by performing 4 tests. We saw which types of solutions had a change of participate or no change at all. I think my group and I worked better than we did before. We were more organized because we assigned specific jobs to one another and shared the work load more evenly. We also had more patience and we each used our strengths to execute the experiment well. We were a little confused in the beginning, but we worked hard to develop a better understanding of this lab. I learned that team work does affect the outcome of the experiment because I know I could not have done it alone and it is always important to get a second opinion. We learned how to work well together. This lab was important because it taught us how to look for ions and this is important in the world because not only can water pollution cause problems, but sometimes there are certain ions present in water that prevent the water from being safe.

Procedure:

Calcium Ion Test:
1. Place 20 drops of distilled water into a 24-wellplate
2. Place 20 drops of reference solution (Ca Chloride) into a wellplate
3. Place 20 drops of control solution into a wellplate
4. Place 20 drops of Tap water into a wellplate
5. Place 20 drops of Natural water into a wellplate
6. Add 3 drops of sodium carbonate test solution to each of the wells
7. Record your observations 
8. Decide if CA2+ cations are present and record your results
9. Discard the contents of the wellplates 
Iron Ion Test
1. Place 20 drops of distilled water into a 24-wellplate
2. Place 20 drops of reference solution (Ferric Nitrate) into a wellplate
3. Place 20 drops of control solution into a wellplate
4. Place 20 drops of Tap water into a wellplate
5. Place 20 drops of Natural water into a wellplate
6. Add one to two drops of potassium thiocyanate test reagent to each of the wells

7. Record your observations 
8. Decide if Fe3+ cations are present and record your results
9. Discard the contents of the wellplates 
Chloride Ion Test
1. Place 20 drops of distilled water into a 24-well plate
2. Place 20 drops of reference solution (Ca Chloride) into a wellplate
3. Place 20 drops of control solution into a wellplate
4.  Place 20 drops of Tap water into a wellplate
5. Place 20 drops of Natural water into a wellplate
6. Add 3 drops of silver nitrate test reagent to each of the wells

7. Record your observations
8. Decide if Cl- anions are present and record your results
9. Discard the contents of the well plates as directed by your teacher
Sulfate Ion Test
1. Place 20 drops of distilled water into a 24-well plate
2. Place 20 drops of reference solution (Ferric Nitrate) into a wellplate
3. Place 20 drops of control solution into a wellplate
4. Place 20 drops of Tap water into a wellplate
5. Place 20 drops of Natural water into a wellplate
6. Add 3 drops of barium carbonate test solution to each of the wells
7. Record your observations 
8. Decide if SO42- anions are present and record your results
9. Discard the contents of the well plates as directed by your teacher

Results:

Overall, I think my group and I worked better than we ever had. We were more organized than before, by assigning specific jobs to each other, and by listening to what we each had to say. Although we were confused on what to do in the beginning, we worked hard with each other, and created a better understanding of what we had to do to make this lab successful.

This is my groups results:

In the calcium ion test, there was no presence of calcium ions in the distilled water, tap water, or control solution. In the reference solution and the natural water there was a presence of ions.

In the iron ion test, there was no presence of iron ions in the distilled water, the natural water, and the reference solution. In the control solution and the tap water there was a presence of these iron ions.

In the chloride ion test, there was no presence of chloride ions in distilled water and natural water. There was a presence of these chloride ions in the reference solution, the control solution, and tap water.

In the sulfate ion test there was no presence of sulfate ions in the distilled water and the tap water, but there was a presence of these sulfate ions in the reference solution, the control solution, and the natural water.

Class results:

These results are important because it allows comparison to check for mistakes in the steps and to make data more accurate. Rather than basing facts on one groups experiments, we are able to study data collected by an entire classroom. All together, we got most of the same results with exceptions due to group errors.

Blog Question

I learned that ions are not visible to the human eye, but there are simple qualitative tests that allow a person to see if there are ions present. I learned how easy these tests were to do.

HW #7

1SBS #25-34 

25. Qualitative tests are tests that identify the presence or absence of a particular substance in a sample. Quantitate tests determine the amount of a specific substance present in a sample.

26. A confirming test is a positive test that confirms that the ion in question in present.

27.
a) We used a reference solution because a reference solution is a solution of known composition used as a comparison. It is knows to contain the sought ion.
b)We used a distilled water-blank because it is known not to contain any ions of interest

28. Yes that means that the iron is present because the test was positive.

29. I would do the Tyndall effect and pass a light through the water.

30. Because medicine is a colloid, it is not uniform and you might only drink some of the minerals or solutes so you need to shake it to drink all the required things in the medicine.

31. It is useful for element symbols to have international acceptance because that way it can be read by anyone and there is never any confusion.

32.

33. It is not possible for water to be 100% chemical free because atmosphere gasses will always dissolve in water to some extent.

34. H20 is a liquid made up of gasses because Oxygen and Hydrogen are gasses and together they make a liquid at room temperature.



Lab Questions #1-4

1. The reference solution and a blank were used to compare results.

2. The problems with qualitative tests are that you can see the presence, but not the amount.

3. If the ions are are in very small amounts, then the chemical test involved is unable to produce a confirming result.

4. If the wells are contaminated, there are bad results.

Blog Question

Testing Water helps us because is it crucial to clean polluted water and repair it of what it is lacking or consisting that is hurting the safety of the water. If we did not test water, it would be dangerous to drink because we could never assume it is clean or else someone could get sick from drinking it.

HW #6

ISBS #19-24

19. a) 6 electrons   b) 13 protons   c) 82 electrons   d) 17 protons

20. a) no   b) no   c) yes   d) no

21. a) anion   b) neutral atom  c) neutral atom   d) cation   e) cation

22.  a) gaining electrons  b) neither  c) neither   d) loosing electrons  e) gaining electrons

23. a) H   b) Na+    c) Cl-   d) Al3+

24) a) KI    b) CaS    c) FeBr3    d) Ba(OH)2    e) (NH4)3 PO4     f) Al203

Water Diary

Blog Question

Blog Question:

What interested me the most the first week was learning about how much unseen life there is. I never realized how many minerals, gases, atoms and everything were around us. I never stop to think about it and i learned a lot. Something that i will remember is that glaciers and icebergs are the second largest place water is found after oceans. That fact was shocking to me.

HW #5

A.7 #1-7 (ONLY DO 1 AND 2)

1. My household used 6,117.1 L of water in 3 days.

2.  About 760 L of water was used on average from each person.

3. This is the class data.

4. The range of the average daily personal water use in my class is 1,493.

5. The mean is 600 L and the median is 579 L and the mean is the better representation.

6. We use more water than the national average because we live in a desert so we water our yards year round and also our class has bigger yards then other homes in other areas, and this requires more water to be used to water he yards.

7. The class average is closer to the national mean.



ISBS #13-18 

13.

14. a)  i, ii, iv, and vi are elements.  b) iii and v are compounds

15. It provides a chemical symbol for each element present and a subscript that states how many atoms of an element are present.

16. a) Hydrogen (3 atoms), Phosphorus (1 atom), and Oxygen (4 atoms).   b) Sodium (1 atom), Oxygen (1 atom), and Hydrogen (1 atom)  c) Sulfer (1 atom) and Oxygen (2 atoms)

17.
a)

b)

c) 17a: two hydrogen atoms + 2 chlorine atoms --> two hydrogen and chlorine. 17b: 2 compounds of two hydrogen and 2 oxygen atoms --> two compounds of two hydrogen atoms and one oxygen atom + two oxygen atoms.

18. a) NaHCO3 + HCl --> NaCl + H20 + CO2    b) C6H12O6 + O6 --> 6 CO2 + 6 H20

HW #4

B.5 #1-2

1.

2. This model represents a heterogenous mixture.

3.

HW #3

ISBS #1-12

1. A physical property is a property that can be measured and observed without changing the chemical makeup of the substance.

2. Three physical properties of water are a density, freezing point, and boiling point.

3. Solid water is less dense than water.

4. When water is heated it turns to gas and when it cools it condenses back to its liquid state. When water is at its freezing point (0 Celsius) it freezes to solid water.

5. A heterogenous mixture is not uniform or the same throughout. Homogenous mixtures and uniform throughout.

6. You need to know the density of water and gasoline to be able to predict which liquid will be on top.

7. a) suspension  b) colloid  c) colloid  d) solution  e) suspension  f) colloid

8) The air is a colloid because the air particles are small enough to stay suspended. There are small particles in the air, which means the air in the room is a colloid and the particles are too small to come out in a filter.

9)

10. It would be a colloid because the beam of light is scattered due to the reflection of the suspended particles. 

11. A substance is a colloid because the particles are too small to filter.

12. a) compound  b) element  c) compound  d) element  e) compound  f) element  g) element

HW #2

Blog:

The periodic table is a table of chemical elements arranged in order of atomic number usually in rows. The elements with similar atomic structures are in vertical columns.

1SAS #3, 4, 5, 6, 7

3. a) Manufature of the filter paper is indirect water use because you do not know the exactly how water is used and you do not know the amount of water used. b) Premoistening of the sand and gravel is direct water use because you use water to moisten it and it can be directly measured. c.) Using water to cool the distillation apparatus is direct water use because the amount of water used can be directly measured and you know exactly why and when the water was used without a doubt.

4. Purifying water means to clean it.

5. Three techniques for purifying water is oil-water separation, sand filtration, and charcoal adsorption.

6. In oil-water separation, the oil was removed from the top layer of the liquid. In the sand filtration step, the and filter collected the solid impurities too large to fit between the sand and gravel. In the charcoal adsorption step, the substances that gave the water bad taste, odor, or cloudy appearance was attracted and held to the surface.

7. a) It could not be suitable for drinking because this simple purification process int he foul-water lab only cleans water enough to wash your hands with. b)Additional purification steps needed are distillation and burning the water so the salt evaporates.

A.8 #1-4

1. I could live without washing my car, floors, and bathing.

2. I could not do without drinking water.

3. I could reduce my water use for showering because i take long showers and i can take faster ones.

4. a) I could use impure water to watering indoor plants. b) This can be taken from skipping a car wash.

Foul Water Lab

Foul Water Lab

Georgie Dorfman, Charlie Dorfman, and Ben Cohen

6-18-13

Dr. Forman

Abstract:

We cleaned up foul water to produce clean water to a point where it could be used to wash our hands with. We filtered the water by performing the procedures of oil-water separation, sand filtration, and charcoal adsorption. The purpose the Foul Water Lab was to learn how to execute the process of purifying water. It was significant because we purified water through three simple steps. The filtration of water is important because it is a necessity to to people around the world. I learned how simple it was to clean water to a point where I could wash my hands with it. I also learned how teamwork is important in each experiment because my team was very helpful to the whole procedure. 

Procedure:



1. Make a data table.

2. Obtain 100 mL of foul water toa beaker and record the volume.

3. Record you observations before the treatment.

4. The the sample sit for a minute.

5. Remove as much of the upper liquid layer and place it in a test tube.

6. Add a few drop of distilled water to the test tube.

7. Record the volume of the remaining liquid.

8. Dispose the liquid in the test tube.

9. Poke holes in the bottom of a disposable cup with a paper clip.

10. Add premoistened gravel and sand layers to the cup.

11. Pour your sample in the cup. Catch the drained liquid in a beaker.

12. Dispose the used sand and gravel.

13. Observe the filtered water and record its volume and results.

14. Fold filtered paper.

15. Place the filtered paper in a funnel and moisten it lightly.

16. Place the funnel in a ring over a beaker.

17. Place one teaspoon of charcoil in an Erlenmeyer flask.

18. Wour the water into a flask, swirl it, then pour the liquid through the filtered paper.

19. If the filtrate is darkened by charcoal, filter the liquid again though a filter paper.

20. Pour the filtered water back into the graduated cylinder and record the volume and properties.

21. Dispose or save your water according to your teachers instructions.

22. Wash your hands.

Results:

Though all the prodecures of first oil-water seperation, sand filtration, and later charcoil adsorbtion, we were able the purify the foul water.

After oil-water seperation we didnt have the floating oil on the surface.

After sand filtration solid particles were seperated from the liquid.

After charcoil adsorbtion the water was completely clear.

We lost about 15 mL of liquid, but ended up with clean water like we first intended.

The aggregated data shows that the volume lowered as the water went through each step in filtration. This is the data gathered from each of the groups in the class:

The foul water ended up not being completely pure. There was electrical conductivity. We know this because we took a conductivity test and the light brightened meaning there is electrical conductivity.

We then used distillation. This is a process that separates liquid substances based on differences in their boiling points.

The foul water ended up not being completely pure. There was electrical conductivity. We know this because we took a conductivity test and the light brightened meaning there is electrical conductivity.



Hw Assignment #1

Hw Assignment #1

1. I think the lack of water is more critical than water pollution because there are many ways to filter and purify polluted water, but there is no way to retain lost water.

ISAS:

1. If Jimmy Hendricks just drank packaged fruit juice during the water shortage he would end up using more water. It takes more water to make fruit juice because the amount of liquid in the container is insignificant when it is compared with the amount of water used to make the container or to irrigate the fruit to process it.

2. In producing bread you need water to irrigate the wheat then processing it requires water then water is used to make the wrapping around the bread.

8. In the past 100 and 1 million years water has been used up more and more. The amount of pollution has also grown over the years.

9. The greatest amount of water abundance on Earth is in oceans, glaciers, rivers, then water vapor.

10. This quote would be true when referring to contaminated or polluted water because you can be surrounded about it, but you can not drink it. This quote may also be true when talking about water in the gaseous state because you can be surrounded by it, but it is physically impossible to drink it.

11. About 80% of water is used irrigation and agriculture in the U.S. region.

12. A) Glaciers and ice caps: 2.11%
      B)  Lakes: 0.009%

13. It might be possible that a molecule of water drunken today was once swallowed by a dinosaur because water is recycled throughout the earth in the sense that rain and snow fall, flow back into large bodies of water, that water evaporates into the air, and falls again.

17.  The fact that each person in the United States uses an average of 370 L of water daily and each capital of the Unites States uses 4960 L is true because not all water is used by people, so a lot of the water used in these capitals would not be considered being used by a person, therefore making this statistic correct.


A.5:

1. For each region in the Unites States the greatest single uses of water are: a) The East: Steam/Electric b) The South: Stream/Electric c) The Midwest: Stream/Electric d) The West: Irrigation/agriculture e) Alaska: Mining f) Hawaii: Irrigation/ agriculture.

2. The East uses more steam and electric water than the West. This is due to the habits in society in each of these areas. The East uses more industrial water while the West uses more irrigation/agricultural because there are more farms in the West due to it's weather and there are more industries in the East.

3. In the East there are very hot summers, which means that the air conditioning is in high usage. The East also gets very cold in the winter, which calls for the heater to be on constantly to warm homes. These two factors in the weather cause high steam and electric usage. The South gets very humid in the summers and this leads to the use of showers more often, which compels water to be used. The warm weather also causes people to spend more time in their homes and houses use a lot of electricity to light. The West has mild weather, which is good for the irrigation and agriculture. This causes more water to be used for watering and growing the crops. Because of the great weather for agriculture and irrigation, the crops need to be processed which also uses water. Alaska's stable economy depends on mining. Mining is a good source of money for many workers in Alaska and this requires the use of water. Hawaii has good weather in the summer for irrigation and agriculture. Hawaii's nice weather is also due to the fact that is is surrounded by a body of water at all sides, which also helps the irrigation and agriculture. She culture in the South consists of big families and because prices of houses are lower in most of the South, that requires more lighting and electricity. The families are also on average bigger so that requires more TVs and computers to be in use.

Intro

Im Georgie
My favorite movie is the Pink Panther.
I have a pure bread chuwawa named Katinka.
I don't like my other dogs.
My favorite food is chocolate.
I have a twin and a older sister.
I love babies and puppies.
I am conversational in Spanish.
I love to golf in my free time.
I love Julia.
Nicolette and Clemmy are my hobbies.
#ballislife