# Chemical Forums

## Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: freshj on March 15, 2004, 05:40:45 PM

Title: Calcium Hydroxide titration with HCl
Post by: freshj on March 15, 2004, 05:40:45 PM
Hello to all. I have titrated a calcium hydroxide (Ca(OH)2) solution against a hydrochloric acid solution. The hydrochloric acid has a concentration of 0.030 mol dm-3. I need to calculate the concentration of the calcium hydroxide solution. Does anyone know how I can do this...
My average titre was 20.38 CM3.
Any help or ideas would be so cool.
Thankyou ??? ???

Edit: Edited the title to be more useful for those perusing the website. Mitch
Title: Re:Concentration calculation
Post by: Mitch on March 15, 2004, 06:52:05 PM
The 2 moles of hydrochloric acid will react with each mole of Ca(OH)2. Therefore determine how many moles of HCl was used, and the amount of Ca(OH)2 will be twice that.
Title: Re:Calcium Hydroxide titration with HCl
Post by: levsoy67 on December 25, 2004, 09:22:24 AM
Ca(OH)2 reacth with 2 moles of HCl
Title: Re:Calcium Hydroxide titration with HCl
Post by: kevins on December 25, 2004, 09:43:39 AM
Yes, correct.
Do you know how to calculate?
Title: Re:Calcium Hydroxide titration with HCl
Post by: Donaldson Tan on December 26, 2004, 06:38:44 PM
2H+ + Ca(OH)2 => Ca2+ + 2H2O

moles Ca(OH)2 reacted = 2 X moles of H+ reacted

moles of H+ reacted = molarity of HCl x corresponding volume

concentration of Ca(OH)2 = moles of Ca(OH)2 / corresponding volume

I hope you understand the workings..