Question

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Answer 1

Answer: 0.101

Step-by-step explanation:

Using the fact that molarity = (moles of solute)/(liters of solution), there are
`(0.150)(35.5/1000)=0.005325` moles of barium hydroxide.

There are 2 moles of hydroxide ions per mole of barium hydroxide, meaning that there are
`(0.005325)(2)=0.01065` moles of hydroxide ions.

To neutralize the solution, the number of moles of hydrogen ions must be equal to the number of moles of hydroxide ions.

Since there is 1 mole of hydrogen ions per mole of nitric acid, we need 0.01065 moles of nitric acid.

Substituting into the molarity formula yields that the concentration is
`(0.01065)/(0.105)=0.101` M.