# Chemistry-pls help urgent

posted by candy

Posted by candy on Tuesday, October 12, 2010 at 5:04pm.

1) How do I prepare 2M nitric acid from 65% concentrated nitric acid?

2) How do I prepare 17% ammonia from 25% concentrated ammonia?

Chemistry -pls help urgent - DrBob222, Tuesday, October 12, 2010 at 5:33pm
Is that 65% and 17% w/w or w/v?
Do you have a density listed.

Chemistry -pls help urgent - candy, Tuesday, October 12, 2010 at 5:51pm
Assuming it is w/w as is the case for most acids and conc ammonia, can you show me the steps using 69% HNO3 and 28% ammonia?
I have density of 69% HNO3 as 1.42g/ml & 28% ammonia as 0.88g/ml.

1. candy

this 17% ammonia is to dissolve my chloride ppt

2. DrBob222

3. candy

Hi, if I want to prepare a w/v solution, how do I prepare it? Thanks a lot.

4. DrBob222

If it's the same 69% w/w with a density of 1.42, then we know it is 69g HNO3/100 g soln. 100 g soln has a volume of 70.4 mL so the solution is 69 g x 100/70.4 = 97.98 g/100 mL which I will round to 98 g/100 mL.
We want, say, 10% w/v.
10% w/v means 10 g HNO3/100 mL solution.
We have 98 g/100 mL so we want to take
100 mL x 10/98 = 10.2 mL of the concd solution and make to 100 mL final volume. Check my thinking.

## Similar Questions

1. ### chemistry

You need to prepare 500.00 mL of a 0.25 M solution of nitric acid . Concentrated nitric acid comes from the chemical copmanies as a 15.8 M liquid. How much (in mL) of this 15.8 M solution will you need to dilute to 500.00 mL to get …
2. ### chemistry

You need to prepare 500.00 mL of a 0.15 M solution of nitric acid . Concentrated nitric acid comes from the chemical copmanies as a 15.8 M liquid. How much (in mL) of this 15.8 M solution will you need to dilute to 500.00 mL to get …
3. ### Chemistry -pls help urgent

1) How do I prepare 2M nitric acid from 65% concentrated nitric acid?
4. ### chemistry

Concentrated nitric acid is 16M. What volume of nitric acid must be diluted with distilled water to prepare 5L of 0.1M nitric acid?
5. ### chemistry

Concentrated nitric acid is 16M. What volume of nitric acid must be diluted with distilled water to preapre 5L of 0.1M nitric acid?
6. ### chemistry

Concentrated nitric acid is 16M. What volume of nitric acid must be diluted must with distilled water to prepare 5L of 0.1M nitric acid?
7. ### chemistry

Concentrated nitric acid is 16M. What volume of nitric acid must be diluted with distilled water to prepare 5L of 0.1M nitric acid?
8. ### Chemistry

How to prepare 10% w/v nitric acid solution?
9. ### chemistry

Given 50 ml of concentrated nitric acid.The density of the concentrated acid is 1.42 g/ml and is 70% HNO3 by wt. Calc. the molality of the conc. acid.
10. ### chemistry

how to prepare 1 L of 2.5M nitric acid from 69% of concentrated nitric acid?

More Similar Questions