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15)a 60.2 mL sample of a 0.588 M calcium nitrate (ca(No3)2)solution is mixed wit

ID: 678011 • Letter: 1

Question

15)a 60.2 mL sample of a 0.588 M calcium nitrate (ca(No3)2)solution is mixed with 80.5 ML of 1.396 M calcium nitrate.Calculate the concentration of the final solution number_________________________ 18) you have 505 ML of a 0.180 M HCL solution and you want todilute it ti exactly 0.100M. how much water should you add? number__________________ML 15)a 60.2 mL sample of a 0.588 M calcium nitrate (ca(No3)2)solution is mixed with 80.5 ML of 1.396 M calcium nitrate.Calculate the concentration of the final solution number_________________________ 18) you have 505 ML of a 0.180 M HCL solution and you want todilute it ti exactly 0.100M. how much water should you add? number__________________ML

Explanation / Answer

15. Concentration of final solution = {(60.2mL*0.588M )+(80.5mL+1.396M)}/(60.2mL+80.5mL)                                                        =1.05M 18 . Formula :   MiVi = MfVf        Given data :  Mi = 0.180M         Vi =505mL                             Mf=0.100M          Vf=?                          Vf = MiVi / Mf                                   =(0.180M*505mL)/0.100M                                  = 909mL                                                               
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