Consider a reaction of Cu (s) +2 H For statements 21-26 indicate whether each st

Question

Consider a reaction of Cu (s) +2 H For statements 21-26 indicate whether each statement is true (A), false (B) or you are Scoring: l (aq) CuCl2 (aq) +H2 (g) with excess HCI. select true or false select true or false incorrectly 0 select unsure 1 point; correctly 3 points . 21. The number of moles of reactants consumed will equal the number of moles of products 1 made. 22. The grams of reactants consumed will equal the grams of products made.I 23· This reaction results in the formation of ionic bonds between Cu and Clions in solution 24. The molarity of reactants consumed will equal the molarity of products made. i 25. Cu is the limiting reactant. 26. The Cu ion formed would have a 2+ charge. Page 7 of 7

Explanation / Answer

Ans 21

False

From the stoichiometry of the reaction 3 moles of reactants consumed and 2 moles of products made

Ans 22

True

Molecular weight of Cu = 63.546

Molecular weight of HCl = 36.46

Molecular weight of CuCl2 = 134.45

Molecular weight of H2 = 2

63.546 g of Cu reacts with (2*36.46=)72.92 g HCl produces 134.45 g of CuCl2 and 2 g of H2

Total reactants consumed = 136.466 g

Total products made = 136.45 g

Ans 23

True

CuCl2 has Ionic bonds

Ans 24

False

Molarity = moles x volume

Moles of reactants consumed is not equal to the moles of products made, therefore molarity is not equal

Ans 25

True

Because HCl is excess reagent (given)

Ans 26

True

Cu2+ 2Cl-

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