KHP is an ionic compound composed of a potassium cation K+ and a hydrogen phthalate anion HP– . HP– is a weak acid and upon dissolving in water, can lower the pH of the solution. (a) Suggest the chemical reaction(s) when a solid sample of KHP is dissolved in water, writing out the chemical equations for them. (b) Sketch the structure of KHP from above and circle the hydrogen atom that is responsible for its acidity. (c) Calculate the pH of a solution made of 0.50 g of KHP and 50 mL of water. KHP has a molar mass of 204.2 g mol and at 25 °C has a pKa of 5.4.
KHP is an ionic compound composed of a potassium cation K+ and a hydrogen phthalate anion HP– . HP– is a weak acid and upon dissolving in water, can lower the pH of the solution. (a) Suggest the chemical reaction(s) when a solid sample of KHP is dissolved in water, writing out the chemical equations for them. (b) Sketch the structure of KHP from above and circle the hydrogen atom that is responsible for its acidity. (c) Calculate the pH of a solution made of 0.50 g of KHP and 50 mL of water. KHP has a molar mass of 204.2 g mol and at 25 °C has a pKa of 5.4.
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KHP is an ionic compound composed of a potassium cation K+ and a hydrogen phthalate anion HP– . HP– is a weak acid and upon dissolving in water, can lower the pH of the solution.
(a) Suggest the
(b) Sketch the structure of KHP from above and circle the hydrogen atom that is responsible for its acidity.
(c) Calculate the pH of a solution made of 0.50 g of KHP and 50 mL of water. KHP has a molar mass of 204.2 g mol and at 25 °C has a pKa of 5.4.
Transcribed Image Text:LOH
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