You have 0.500 l of an 0.250 m acetate buffer solution (i. e. [hc₂h₃o₂] + [c₂h₃o₂⁻] = 0.250 m) at ph 3.50. how many ml of 1.000 m naoh must you add in order to change the ph to 5.25? acetic acid has a pka of 4.74.

Explanation:

Relation between pH and is as follows.

            pH =

Hence, total moles of acetate is calculated as follows.

           = 0.125 M

                 =

                 = 0.0575

Let us assume that there are x moles of acid. Hence, moles of B are as follows.

                 B = (0.125 - x) moles

      = 0.0575

                  x = 0.118 moles

Now, we will calculate the concentration as follows.

           5.25 = 4.74 +

                        = 3.236

                     x =

                         = 0.0295 moles

Therefore, moles of NaOH needed to add are as follows.

        = (0.118 - 0.0295) moles

          = 0.0885 moles

                            =

                            = 88.5 ml

Thus, we can conclude that there is 88.5 ml of 1.000 M NaOH must you add in order to change the pH to 5.25.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them  

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter