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Standard solutions of calcium ion used to test for water hardness are prepared by dissolving pure...

Question:

Standard solutions of calcium ion used to test for water hardness are prepared by dissolving pure calcium carbonate, CaCO3, iFor convenience, one form of sodium hydroxide that is sold commercially is the saturated solution. This solution is 19.4 M, wWhat volume of 0.616 M NaOH solution would be required to neutralize 26.7 mL of 0.304 M HNO3 solution? Volume mL

Standard solutions of calcium ion used to test for water hardness are prepared by dissolving pure calcium carbonate, CaCO3, in dilute hydrochloric acid. A 1.579 g sample of CaCO3 is placed in a 150.0 mL volumetric flask and dissolved in HCl. Then the solution is diluted to the calibration mark of the volumetric flask. Calculate the resulting molarity of calcium ion. Molarity M
For convenience, one form of sodium hydroxide that is sold commercially is the saturated solution. This solution is 19.4 M, which is approximately 50% by mass sodium hydroxide. What volume of this solution would be needed to prepare 5.06 L of 5.42 M NaOH solution? Volume mL
What volume of 0.616 M NaOH solution would be required to neutralize 26.7 mL of 0.304 M HNO3 solution? Volume mL

Answers

molarity = 5.42= n cont 5.06 (OH) M an=27.4252 moles of Naolt golt Weight 2-(27.4252 )*(409 – Machi 11.o 1097.008 grams WeighM(NaOH) x Varaolt = M (HNO3) * VANO HNO3 (0.616 M) x Viao H = (0.304)x (26.7mL) VNGUH NaulH = 13. 1766 2337 m Liu

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