Need help physical chemistry

[kshanmugam]

Given a pure 0.50 M of HCN solution, calculate the volume that when diluted to a total volume of 70.0mL will yield a pH that is 0.65 unit higher than that of the given solution. Consider the volumes of the original solution and of the diluent to be precisely additive.

I need help with the above question.

[opuntia]

I think you ought to show some extent of your work to get the answer :wink:

[love ya]

Can someone please help me with bismuth. i need help on finding how the element got named and who discovered it?

[opuntia]

Oh, it's very easy, simply go to wikipedia and search for that element, you'll be able to find almost everything you need in there, here is a link to wikipedia

Hope that helps