[calvert11]

Question
What mass of solid forms upon mixing 50.0 mL of 3.30 M sodium hydroxide with 35.0 mL of 1.00 M magnesium chloride?

Attempt
2NaOH + MgCl2 -> 2NaCl + Mg(OH)2 ***Mg(OH)2 is the solid

I thought that I should find the limiting reactant and convert that into moles of the solid and then into grams. But the answer is wrong. Any ideas on how to solve this problem?

[Borek]

How much solid did you get?

Perhaps you should take solubility (Kso) into account.

[calvert11]

How much solid did you get?

Perhaps you should take solubility (Kso) into account.

It was far larger than it should have been. (23 g is correct, I got 178).

But are you saying my approach to the problem is correct?

However, what's "Kso"? If you're saying I should take into account the degree of solubility of the compounds, I think that's a bit beyond what I'm studying now. Just knowing whether the compound is soluble should be enough to solve the problem. I'm taking Chemistry 1, non honors.

[Borek]

(23 g is correct, I got 178).

Both are wrong if it makes you feel better.

But are you saying my approach to the problem is correct?

Yes.

How many moles of NaOH?

How many moles of MgCl₂?

Which one is limiting?

How many moles of the product?

What is mass of the product?

However, what's "Kso"? If you're saying I should take into account the degree of solubility of the compounds, I think that's a bit beyond what I'm studying now. Just knowing whether the compound is soluble should be enough to solve the problem. I'm taking Chemistry 1, non honors.

If you don't know what Kso is (it is called solubility product by the way) you are most likely right that you should not bother.

[calvert11]

But are you saying my approach to the problem is correct?

Yes.

How many moles of NaOH?

How many moles of MgCl₂?

Which one is limiting?

How many moles of the product?

What is mass of the product?

Thanks for the help. I've got the answer.