Answered

Balance the following equation. Then determine the mole ratio of Ca(OH)2:Al(OH)3.

Al2(SO4)3 + Ca(OH)2 Al(OH)3 + CaSO4?

A.)2:3

B.)3:2

C.)1:2

D.)3:3

E.)1:1

Verified Answer :

aaronf99

You can use the mole ratios given by the coefficients in the balanced chemical equation. The coefficients are the smallest whole-number number of moles. 

Aluminum hydroxide is insoluble in water, while calcium sulfate is only marginally soluble. 

Al2(SO4)3(aq) + 3Ca(OH)2(aq) --> 2Al(OH)3(s) + 3CaSO4(s)  
1 mol ................. 3 moles ............... 2 moles ......... 3 moles 
0.725 mol  
0.725 mol ......... 3(0.725) mol ........ 2(0.725) mol ..3(0.725) mol 

Al2(SO4)3(aq) + 3Ca(OH)2(aq) --> 2Al(OH)3(s) + 3CaSO4(s)  
1 mol ................. 3 moles ............... 2 moles ......... 3 moles 
........ .................. 0.774 mol 
0.774 / 3 mol ..... 0.774 mol .......... 2/3(0.774)mol.. 0.774 mol

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