Question

Check work?

I suppose I would do this with the proper sig figs?

A buret containing NaOH solution has an initial volume reading of 0.14 mL. A 25.00 mL solution of 0.1000 M HCl is titrated to a phenolphthalein end point, which occurs at a final buret reading of 27.16 mL of NaOH. What is the molarity of the NaOH titrant?

My work:
http://imgur.com/tBITDwk

Answer 1

@Vocaloid

Answer 2

*actually, I think I made a mistake with sig figs

Answer 3

*0.027

Answer 4

You did the steps to the answer correctly.

But there were some mistakes

There should be a parentheses like this to avoid confusion.
\[(27.16-0.14) \times \frac{ 1L }{ 1000mL }\]
Since your teacher might think you multiplied it tje 0.14 by 1/1000.

Second you do not need to round your significant figures until it is your final answer.
(27.16-0.14) x (1/1000) should not be in significant figure.
I saw that you rounded the 0.02702 into 0.03.
It is not necessary.

Answer 5

You are right that your answer is in 2 significant figures.

Answer 6

0.14mL has the least significant figures and your final equation is dividing.
Dividing would be the lowest significant figure in the question.

Answer 7

0.093 M NaOH

Answer 8

0.003mol NaOH/0.02702L NaOH=0.11M