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#1 2013-02-17 20:33:21

Stella198392
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!!!!help Me Please - Word Problem Chemistry Related!!!!

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%

#2 2013-02-17 22:29:25

SORRY
Guest

Re: !!!!help Me Please - Word Problem Chemistry Related!!!!

Its G/ CM CUBED

#3 2013-02-20 14:15:59

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,576

Re: !!!!help Me Please - Word Problem Chemistry Related!!!!

(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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#4 2013-02-20 19:17:02

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,658

Re: !!!!help Me Please - Word Problem Chemistry Related!!!!

Actually, I think 1500ml must be added.


“Here lies the reader who will never open this book. He is forever dead.

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#5 2013-02-21 17:31:54

bob bundy
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Registered: 2010-06-20
Posts: 6,532

Re: !!!!help Me Please - Word Problem Chemistry Related!!!!

Hi

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

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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