[jwmille3]

How should I go about trying to solve this problem, or what formulas should I use?

The concentration of HCl in a bottle was determined as follows:
3.00 mL of the acid were diluted to 100.00 mL
27.48 mL of the diluted acid were titrated with 0.08960-M NaOH
35.52 mL of the base were required to reach the end point
What is the HCl concentration in the bottle?

Thanks!!!

-jwmille3

[Yggdrasil]

Please read the Forum Rules before posting.  Before we can help you, you must show that you've at least attempted to solve the problem.

But, here are some starting questions to consider:

1.  Always start with a balanced chemical reaction.

2.  From the information below:

27.48 mL of the diluted acid were titrated with 0.08960-M NaOH
35.52 mL of the base were required to reach the end point

can you determine how much you used in the reaction?

3.  From the answer to (2) and the balanced chemical reaction in (1) can you determine how much HCl reacted with the NaOH.

4.  (3) is the amount of HCl in 3.00mL.  Use this to determine the concentration.