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August 31, 2014

Homework Help: Chemistry please help!

Posted by Robert on Monday, February 22, 2010 at 1:30pm.

Please help. I have no idea how to do these 4 homework problems.

1- How many milliliters of 0.140 M HCl are needed to completely neutralize 42.0mL of 0.106 M Ba(OH)2 solution?

2-How many milliliters of 0.123 M H2SO4 are needed to neutralize 0.250 g of NaOH ?

3-If 55.2 mL of BaCl2 solution is needed to precipitate all the sulfate ion in a 750 mg sample of Na2SO4 , what is the molarity of the solution?

4-If 42.7 mL of 0.218 M HCl solution is needed to neutralize a solution of Ca(OH)2 , how many grams of Ca(OH)2 must be in the solution?

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