[freshj]

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

[Mitch]

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.

[levsoy67]

Ca(OH)2 reacth with 2 moles of HCl

[kevins]

Yes, correct.
Do you know how to calculate?

[Donaldson Tan]

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..