Question

In the reaction between AgNO3 and Cu, Ag and Cu(NO3)2 is produced. We determined that the experimental molar ratio of Ag to Cu is 2 to 1. How would this ratio change (decrease, increase, stay the same) if

a) the silver crystals produced were not washed clean before being dried and weighted?

b) some of the AgNO3 crystals remained in the original vial while transferring them to the test tube

c) Some of the silver crystals were lost when silver was transfered to the beaker.

Thanks!

Answer 1

C_4 + Ag No_3 rightarrow Cu(NO_3)_2 + Ag experimental molar ratio [Ag]/[cu] = 2: 1 a) increase as due to impurity weight will be more b) if some of AgNo_3 crystals remained in the original vial them moles of Ag formed will be lesser and ratio decrease C) again decrease as moles of Ag will be lesser