# Chemistry

How would I find the percent of water lost in alum after it has dried for a week?
Wet Alum = 13.44g
Dry Alum = 11.28g

1. 👍
2. 👎
3. 👁
1. I believe you would subtract the dry weight of the alum from the wet alum weight, then divide that answer by the original weight of wet alum:

13.44g(wet) - 11.28g (dry) = 2.16g of water that was lost.

2.16g H20/ 13.44g wet alum =0.1607 X 100 = 16.07% H20 lost

Hope this helps :)

1. 👍
2. 👎

## Similar Questions

1. ### math

Fresh raspberries are 80% water. Dried raspberries are only 20% water. How many pounds of dried raspberries do you get from 36 lb of fresh berries?

2. ### University Chemistry (first year)

I'm working on a first year chemistry lab where we synthesized alum from alunimini foil and I'm doing the report and one of the questions is as follows: Based on your findings, what volume of water can be cleared of suspended

3. ### Chemistry

Potash alum is a double salt. Explain this statement using the chemical formula of the alum.

4. ### Chemistry

A 2.559 9 pellet containing NaCl and KCl is dissolved in water. A silver nitrate solution is mixed with water containing the pellet, and a precipitate forms. The precipitate is separated and dried and found to have a mass of 5.112

1. ### Science

A solution is prepared by dissolving 15grams of table salt in 70grams of water. Find (a) mass percent of solute (b) mass percent of solvent.

2. ### Chemistry

If the percent yield was 81.5%, how many grams of aluminum were used to prepare 20.0 g of potassium alum?

3. ### college chem

A 1.10g- sample contains only glucose and sucrose . When the sample is dissolved in water to a total solution volume of 25.0ML , the osmotic pressure of the solution is 3.78atm at 298K a.What is the percent by mass of glucose in

4. ### Chemistry

Potash alum is adouble salt . Explain this statement using the chemical formula of the alum

1. ### Chemistry

Calculate the percent yield of alum if you obtained 75.0 g of potassium alum from 5.00 g Al.

2. ### Chemistry

Why are alum rystals not supposed to washed in pure water?

3. ### Chemistry

Compounds like CCL2F2 are known as chloroflourocarbons, or CFCs. These compounds were once widely used as refrigerants but are now being replaced by compounds that are believed to be less harmful to the environment. The heat of

4. ### Chemistry

A mixture contains only NaCl and Al2(SO4)3. A 1.45-g sample of the mixture is dissolved in water and an excess of NaOH is added, producing a precipitate of Al(OH)3. The precipitate is filtered, dried, and weighed. The mass of the