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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: mrmetaluk on February 10, 2010, 05:00:53 PM

Title: OH- ion concentration in an aqueous solution containing cadmium ions at 11.2 pH
Post by: mrmetaluk on February 10, 2010, 05:00:53 PM

Can any of you kind people please help me with the above question?

I have read some of the posts on calculating this type of equation but despite following the advice I cannot get what I believe is the correct answer. The solution contains cadmium 2+ ions at a 2.5 x 10^-3 concentration.

I keep getting 1.585 x 10^-11 which I don't think is right.

Thanks in advance for any help with this. I will be most grateful.

Gavin.

Title: Re: OH- ion concentration in an aqueous solution containing cadmium ions at 11.2 pH
Post by: cliverlong on February 11, 2010, 04:04:31 AM

Please show your working

Title: Re: OH- ion concentration in an aqueous solution containing cadmium ions at 11.2 pH
Post by: mrmetaluk on February 22, 2010, 01:00:57 PM

Thanks for your reply but I got a friend (who has a much better grasp of this than I do!) to go through it with me and show me where I was going wrong. The correct answer (If memory serves) was 1.585 x 10^-3

Cheers,

Gavin.