Reactions that involve carbonates and sulfites with acids have both characterist

Question

Reactions that involve carbonates and sulfites with acids have both characteristics of decomposition and double replacement True False Based on your answer in question 10, if have 0.45 moles of copper produced from this reason, the number of moles of aluminum needed as a starting reagent is the 0.45 moles of Aluminum 0.3 moles of Aluminum 0.90 moles of Aluminum 0.225 moles of Aluminum If I do a reaction where copper sulfate (blue) and aluminum metal are involved, then after the reaction there is of blue solution. The blue solution indicates Balance the following decomposition equations

Explanation / Answer

(25) TRUE
(26) 3 Cu2+ (aq.) +2 Al (s) -----------> 3 Cu (s) + 2 Al3+ (aq.)

SO, to deposit 3 mol of Cu it requires 2 mol of Al

then to deposit 0.45 mol of Cu, 2 * 0.45 / 3 = 0.3 mol of Al

(b)

(27) (c) limited amount of CuSO4

(28) 2 H2O (l ) ----------> 2 H2 (g) + O2 (g)

(A) 2, 2 , 1

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