Please I need help with the problem

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %