For the following reaction, 6.49 grams of potassium hydroxide are mixed with excess phosphoric acid. The reaction yields 6.86 grams of potassium phosphate.
 potassium hydroxide (aq) + phosphoric acid (aq) potassium phosphate (aq) + water (1)
 grams
 What is the theoretical yield of potassium phosphate?
 What is the percent yield of potassium phosphate?
 %