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July 22, 2014

Homework Help: chemistry 1st year, for midterm help

Posted by ur class fella on Wednesday, February 11, 2009 at 11:10pm.

Hi,

Can any1 help with theses questions. I need to solve these because there will be similar questions on the midterm for me, coming week. Btw I have tried few.

1. How many milliliters of a 15.0%, by mass solution of KOH (Aq) ( d= 1.14g/mL ) are required to produce 27.0 of a solution with pH= 11.45?

Answer is required in mL. Liters is just as fine as mL :P


50.00 mL of 1.4510−2 M HI(aq) is mixed with 85.00 mL of 1.1010−2 M KOH (aq).
Above is the data given which is required to solve Q2:

Q2:- What is the of the final solution?


Q3:- What is the pH of an aqueous solution that is 0.124 M NH4Cl?


Thanks in Advance for answering the questions, plz provide the solution if possible?

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