58 842
Assignments Done
Successfully Done
In March 2018
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Other Chemistry Question for arcdp

Question #24040
1) 4g of NaOH is mixed with 1.5L of a solution which has a pH of 1.54, what is the new pH?
2) A solution of 4ml of LiOH of 0.5M and 15ml of 0.1M of H are mixed, what is the new pH?
Pls. answer in complete, your answer is very helpful to me tnx...
Expert's answer
A pH of 1.54 means [H+] is 10-1.54 or 0.029 M

4 g of NaOH in 1.5 L of water is a concentration of 0.067 M

The OH- and H+ will react, leaving 0.038 M OH-

Using Kw, that gives 2.6 x 10-13 for the concentration of H+, which is a pH 12.6

4 mL of 0.5 M OH- contains 2 mmol of OH-

10 mL of 0.1 M H+ contains 1 mmol of H+

After they react, you'll have 1 mmol of OH- left in a total of 19 mL, or a 0.053 M solution

That means 1.9 x 10-13 M H+, or a pH of 12.7

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!


No comments. Be first!

Leave a comment

Ask Your question