A 5.00g piece of Copper metal is added to a colorless aqueoussolution that conta

Question

A 5.00g piece of Copper metal is added to a colorless aqueoussolution that contains 20.0g of
Zn(No3)2. The products that form are a water soluble blue ioniccompound and a gray metal. a) write a balanced equation for the single displacementreaction that should occur. b) Identify the limiting reactant c) Predict the appearence of the substances left in thereaction container once the reaction is compleate. A 5.00g piece of Copper metal is added to a colorless aqueoussolution that contains 20.0g of
Zn(No3)2. The products that form are a water soluble blue ioniccompound and a gray metal. a) write a balanced equation for the single displacementreaction that should occur. b) Identify the limiting reactant c) Predict the appearence of the substances left in thereaction container once the reaction is compleate.

Explanation / Answer

Balanced equation --------------------             Cu   + Zn(NO 3)2----------->   Cu(NO3)2   +   Zn 63.54 g of Cu on reacting with ( 65.38 + 2 ( 14 + 3( 16 )) ) g [= 189.38 g ] of Zn(NO 3)2 5 g g of Cu requires x g of Zn(NO3)2 x = ( 189.38 * 5 ) / 63.54    = 14.9024 g of  Zn(NO3)2 substances left in the reaction container once the reaction iscompleate is Zn(NO 3)2 and the amountleft is = 20 - 14.9024                                                                                                                                                                 = 5.0976 g The limiting reactant is Zn(NO 3)2

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