Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the

Question

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand notation as KHP. How many grams of KHP are needed to exactly neutralize 22.8 mL of a 0.142 M barium hydroxide solution ? grams KHC8H4O4

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand notation as KHP.

What volume of a 0.441 M barium hydroxide solution is needed to exactly neutralize 4.80 grams of KHP ?

ANSWER:   mL barium hydroxide

Explanation / Answer

1). moles of barium hydroxide= 0.142*(22.8/1000) = 0.0032376 mol

KHP : Ba(OH)2 = 2:1

so the moles of KHP required= 0.0032376 * 2=0.0064752 mol

weight of KHP= 0.0064752 *204.22 = 1.322365 g

2). moles of KHP = 4.80/ 204.22 = 0.0235 mol

required number of moles of Ba(OH)2 = 0.0235/ 2 =0.01175 mol

volume of Ba(OH)2 required = (0.01175 /0.441) * 1000= 26.64 mL

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