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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: son012189 on February 25, 2008, 11:23:10 PM

Title: How do I find the pH of this solution.
Post by: son012189 on February 25, 2008, 11:23:10 PM

What is the pH of a 0.011 M Ba(OH)2 solution?

Yes, I attempted to solve this problem, The problem is I don't know what K_b is. I don't know how I can solve this problem without knowing what K_b is. How would I solve this problem?

Title: Re: How do I find the pH of this solution.
Post by: Borek on February 26, 2008, 03:13:34 AM

I would start assuming full dissociation, Ba(OH)₂ is a strong base.

Title: Re: How do I find the pH of this solution.
Post by: son012189 on February 26, 2008, 11:22:03 AM

Quote from: Borek on February 26, 2008, 03:13:34 AM

I would start assuming full dissociation, Ba(OH)₂ is a strong base.

Thanks, I have another question, how can you tell if a compound is a strong base?

Title: Re: How do I find the pH of this solution.
Post by: Borek on February 26, 2008, 11:41:43 AM

You remember them - alkali metals, plus Ca/Sr/Ba. Some quaternary ammonium cations.

Everything else is weak.

Title: Re: How do I find the pH of this solution.
Post by: son012189 on February 26, 2008, 06:56:12 PM

Thanks again