An approximately 0.1 M NaOH solution is made by adding 4.0 g of solid NaOH to 1000 mL. of water. The precise concentration of the solution is determined by titrating the NaOH against portions of a weak acid, potassium acid phthalate (KHP) obtained from the National Bureau of Standards and certified as being 99.99% pure. The KHP samples are weighed by difference on a balance. How would the calculated NaOH concentration be affected (in comparison with the true concentration), if: (does it become greater, smaller, or unchanged) 1. The KHP was not dried prior to weighing? 2. The balance always read high, but in proportion to the weight recorded?

An approximately 0.1 M NaOH solution is made by adding 4.0 g of solid NaOH to 1000 mL. of water. The precise concentration of the solution is determined by titrating the NaOH against portions of a weak acid, potassium acid phthalate (KHP) obtained from the National Bureau of Standards and certified as being 99.99% pure. The KHP samples are weighed by difference on a balance. How would the calculated NaOH concentration be affected (in comparison with the true concentration), if: (does it become greater, smaller, or unchanged) 1. The KHP was not dried prior to weighing? 2. The balance always read high, but in proportion to the weight recorded?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter13: The Chemistry Of Solutes And Solutions

Section: Chapter Questions

Problem 113QRT: A 0.250-M sodium sulfate solution is added to a 0.200-M barium nitrate solution and 0.700 g barium...

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