Making a 31% solution a 10% one... Math?

brian steinberger

Subscriber

Joined

Jan 5, 2007

Messages

3,008

Location

Pennsylvania

Format

Med. Format RF

• Mar 29, 2010

• #1

I have a 31% solution (100ml total) of hydrochloric acid and a formula that calls for a 10% solution. This may be a stupid question, but I'm bad at math. This is my guess, add water to make 310ml?

 

Anon Ymous

Member

Joined

Feb 7, 2008

Messages

3,661

Location

Greece

Format

35mm

• Mar 29, 2010

• #2

Yes, you can add water to make 310ml and it will become a 10% solution. On the other hand, if you need x ml of 10% solution, then x/3,1ml of the 31% solution will give the same amount of HCl.

 

Bob-D659

Member

Joined

Feb 10, 2008

Messages

1,273

Location

Winnipeg, Ca

Format

Multi Format

• Mar 29, 2010

• #3

Always add the acid to water, not the other way around, otherwise you just might get a bath.

 

OP

OP

brian steinberger

Subscriber

Joined

Jan 5, 2007

Messages

3,008

Location

Pennsylvania

Format

Med. Format RF

• Mar 29, 2010

• #4

Thanks so much guys!