How many grams of CaCl2 are needed to produce 10.0 grams of NaCl?


3 CaCl2 + 2 Na3PO4 → Ca3(PO4)2 + 6 NaCl


_ grams of CaCl2 (round to 3 sig figs)


a) 9.50

b) 12.4

c) 534

d) 6.89

Respuesta :

9.55 grams of CaCl2 are needed to produce 10.0 grams of NaCl.

HOW TO CALCULATE MASS IN STOICHIOMETRY:

The mass of a compound in a balanced reaction can be calculated as follows:

3CaCl2 + 2Na3PO4 → Ca3(PO4)2 + 6NaCl

Based on the above equation, 3 moles of CaCl2 produces 6 moles of NaCl.

Moles of NaCl = 10g ÷ 58.5g/mol = 0.171mol

0.171 mol of NaCl will be produced by (0.171 × 3/6) = 0.086mol of CaCl2.

Mass of CaCl2 = 111g/mol × 0.086mol

Mass of CaCl2 = 9.55g

Therefore, 9.55 grams of CaCl2 are needed to produce 10.0 grams of NaCl.

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