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DIY SOLUTIONS FOR YOUR HEALTH
How to dilute a solution

How to Dilute a Solution

To prepare N units of a C2% Concentration solution from a C1 % solution, you need:

N x C2%

_____________units of C1 % solution

C1%

For required dilution:

Add calculated number of units of C1 % solution to (N minus calculated number) oz. of water, for a total of N units of a C2% solution

Specialnote when diluting a violently reactive solution –Eg. hydrochloric acid, it is safer (contains somewhat violent reaction in a less full container) to add half of the required water before adding the calculated number of required units of C1 % solution, and then top up with the rest of the water, for a total of N units

Example 1:

To prepare N ( 8 oz.) of C2 % (6 %) hydrochloric acid from aC1 % (32%) hydrochloric acid solution, you need:

8 x 6%

_____________oz. of 32 % solution =1.5 oz.

32 %

You will be adding 1.5 oz. 32% hydrochloric acid to 6.5 (i.e. 8- 1.5 ) oz. of water

for a total 8oz.of 6% solution of Hydrochloric acid

HOWEVER, since HCl acid produces a somewhat violent reaction with water, then first add 4 oz. water, then 1.5oz. 32 % hydrochloric acid, then finally top up with 2.5(i.e. 8minus 4 minus 1.5) oz. water

Example 2:

Make 100 ml of a 3 % solution of hydrogen peroxide from 35% hydrogen peroxide:

You need:100 x 3%

_____________ml of 35 % solution = ~8.5 ml.

35 %

Add8.5 ml. 35 % hydrogen peroxide to 91.5 (i.e. 100 minus8.5 )ml. water for a total of 100 ml. of a3 % solution of hydrogen peroxide

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