Question

2) If 358 mL of H2SO4 is neutralized with 60.0 mL of 1.50 M NaOH, what is the initial concentration of the acid? Make sure to include the balanced chemical equation for the reaction. 3) 78 mL of 2.5 M phosphoric acid is neutralized with 500 mL potassium hydroxide. What is the concentration of the base? Include the balanced chemical equation for the reaction.

Answer 1

Answer:

To calculate the concentration of our diluted sample we multiply by the inverse of our dilution factor . Often we wish to work backwards. Let's say we had a sample that had been diluted 1/5 that has a concentration 0f 0.60 M.

Answer 2

Answer:

Explanation:

When you're diluting a solution, you're essentially keeping the number of moles of solute constant while changing the total volume of the solution.

Now, let's assume that you don't know the equation for dilution calculations.

In this case, you can use the molarity and volume of the concentrated solution to determine how many moles of hydrochloric acid you start with.