Final answer:
To find the grams of KHP needed to react, we divide the grams of K2CO3 by the molar mass of K2CO3 and multiply by the molar mass of KHP. The correct answer is option C (368 g).
Step-by-step explanation:
To determine the grams of KHP (KHC8H4O4) needed to react, we need to know the molar mass of KHP and the balanced chemical equation. Assuming KHP has a molar mass of 204.23 g/mol, the balanced chemical equation for the reaction is:
KHP + KOH → K2CO3 + H2O
From the equation, we can see that the stoichiometric ratio between KHP and K2CO3 is 1:1.
Therefore, to find the grams of KHP needed, we divide the grams of K2CO3 (given as 204 g, option A in the question) by the molar mass of K2CO3 (138.205 g/mol) and multiply by the molar mass of KHP:
(204 g/138.205 g/mol) * 204.23 g/mol ≈ 300 g
Hence, option C (368 g) is the correct answer.