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**Stella198392****Guest**

A chemist has 500ml of a salt solution that contains 2% salt in units of g/cm squared. How much water must be added to reduce the concentration to 0.5%

**SORRY****Guest**

Its **G/ CM CUBED**

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,585

(49/50)(500ml)(3) should work. The reason is that if 49 parts water out of 50 make 98% water, then that's 2% salt by weight.

so therefore you want to quadruple the water to go from 2 to 1 to 1/2 of a percent salt. So add 3 more times the 49 parts.

Am i right?

**igloo** **myrtilles** **fourmis**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,822

Actually, I think 1500ml must be added.

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,740

Hi

Mrs b agrees with 1500 & with g per cm cubed.

Bob

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