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### Topic: 10% HCl and 10% Acetic Acid mixture  (Read 1658 times)

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#### WorkWork888

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##### 10% HCl and 10% Acetic Acid mixture
« on: January 23, 2019, 11:56:59 AM »
Hello,

I am wanting to blend up a mixture of two acid blends from the concentrated form.

10% HCl and 10% Acetic acid together to make 250ml total volume.

C1V1 = C2V2 is used, what happens when I involve two acids together?

THanks

#### jeffmoonchop

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##### Re: 10% HCl and 10% Acetic Acid mixture
« Reply #1 on: January 23, 2019, 04:30:41 PM »
Add 25ml acetic acid and 25ml HCl to 200ml water. That gives you 10% volume of each

#### WorkWork888

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##### Re: 10% HCl and 10% Acetic Acid mixture
« Reply #2 on: January 23, 2019, 08:28:09 PM »
Thanks Jeff,

#### AWK

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##### Re: 10% HCl and 10% Acetic Acid mixture
« Reply #3 on: January 24, 2019, 07:39:48 AM »
Hello,

I am wanting to blend up a mixture of two acid blends from the concentrated form.

10% HCl and 10% Acetic acid together to make 250ml total volume.

C1V1 = C2V2 is used, what happens when I involve two acids together?

THanks
Your formula would accidentally work correctly only when densities of all solution will be 1.00 g/cm3. This is not the case
(36 \$ HCl d=1.18, 100 % glacial acetic acid  d=1.05). You should use a formula for calculation concentration given in percentages. The only problem is the density of the final solution - my guess is that a good approximation will be d=1.05.
AWK

#### WorkWork888

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##### Re: 10% HCl and 10% Acetic Acid mixture
« Reply #4 on: January 30, 2019, 12:39:55 AM »
Hello AWK,

Would this work out? or am I going all over the place?

37% HCl ( 20mls of HCL ) = 10% HCl (Volume)
740/ 10 = 74ml of water
74ml - 20mls of HCL = 54 mls of water to add
then add 5.5 ml of glacial acetic acid

#### AWK

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##### Re: 10% HCl and 10% Acetic Acid mixture
« Reply #5 on: January 30, 2019, 05:47:52 AM »
Without any calculations, the amount of acetic acid should be about 5 times more.
Your calculations should be based on the mass balance.
You should use calculations concerned mass percentage. Your final solution should contain 10 % of pure HCl and 10 % of pure acetic acid.
What is a mass of the final solution with the density of 1.05 g/cm3? What are the masses of pure HCl and acetic acid in this solution?

Forget about a volume of water. After mixing concentrated solutions you should add water up to the final volume 250 cm3 (though calculation will be done for a mass of this solution).
AWK