Final answer:
To determine the molarity of a solution of nitric acid, find the moles of nitric acid and the volume of the solution. Then, use the formula Molarity = moles of solute / volume of solution.
Step-by-step explanation:
To determine the molarity of a solution of nitric acid, we can use the formula:
Molarity = moles of solute / volume of solution (in liters)
In this case, we'll need to calculate the moles of nitric acid and the volume of the solution.
Given that 0.216g of barium hydroxide is required to neutralize 20.00ml of nitric acid, we can use the balanced chemical equation to find the number of moles of nitric acid:
2HNO3 (aq) + Ba(OH)2 (aq) → Ba(NO3)2 (aq) + 2H2O(l)
From the equation, we can see that it takes 2 moles of nitric acid to react with 1 mole of barium hydroxide. So the number of moles of nitric acid is:
moles of HNO3 = (0.216g / molar mass of HNO3) / 2
Next, we need to calculate the volume of the solution:
volume of solution = 20.00ml / 1000 (to convert from ml to L)
Finally, we can calculate the molarity:
Molarity = moles of HNO3 / volume of solution