Calculate the percentage of citric acid in a candy if 1

Calculate the percentage of citric acid in a candy if 1 -...

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Calculate the percentage of citric acid in a candy if 1.35 g of the candy was exactly neutralized by 29.50 mL of 0.148 M sodium hydroxide solution. The formula for citric acid is H3C6H5O7. Methylamine, CH3NH2, is a weak base that reacts according to the equation above. CH3NH2 + H2O CH3NH3+ + OHThe value of the ionization constant, Kb, is 5.25 x10-4. Methylamine forms salts such as methylammonium nitrate, CH3NH3+)(NO3-). (a) Calculate the hydroxide ion concentration, [OH-], of a 0.225- molar aqueous solution of methylamine.
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Unformatted text preview: (b) Calculate the pH of a solution made by adding 0.0100 mole of solid methylammonium nitrate to 120.0 milliliters of a 0.225-molar solution of methylamine. Assume no volume change occurs. (c) How many moles of either NaOH or HCl (state clearly which you choose) should be added to the solution in (b) to produce a solution that has a pH of 11.00? Assume that no volume change occurs. (d) A volume of 100. milliliters of distilled water is added to the solution in (c). How is the pH of the solution affected? Explain....
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This note was uploaded on 07/06/2011 for the course SCH 4U taught by Professor White during the Spring '10 term at Beacon FL.

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