Asked by angy
Hydrochloric acid solution reacts with zinc according to the following equation:
2H3O + Zn -> Zn^2+ + H2 +2H2O
100ml of hydrochloric acid solution Ca=0.5mol/l must be prepared from C=5mol/l hydrochloric solution.
1) Specify the glassware needed for this preparation .
At time t=0 a volume Va=40ml of hydrochloric acid solution of concentration Ca=0.5mol/l is poured into a flask containing a mass 1g of powedered zinc . We admit that the volume of the mixture remains constant .
2) Explain the advantage of the use of powdered zinc instead of a zinc strip in this study.
2H3O + Zn -> Zn^2+ + H2 +2H2O
100ml of hydrochloric acid solution Ca=0.5mol/l must be prepared from C=5mol/l hydrochloric solution.
1) Specify the glassware needed for this preparation .
At time t=0 a volume Va=40ml of hydrochloric acid solution of concentration Ca=0.5mol/l is poured into a flask containing a mass 1g of powedered zinc . We admit that the volume of the mixture remains constant .
2) Explain the advantage of the use of powdered zinc instead of a zinc strip in this study.
Answers
Answered by
DrBob222
If you want to dilute the solution from 5 M to 0.5 M, you must dilute by a factor of 10. You want 100 so take 10 mL and dilute to 100. For this you will need a 10 mL pipet and a 100 mL volumetric flask.
2. Powdered Zn has MUCH MORE surface area so the reaction is faster (MUCH FASTER).
2. Powdered Zn has MUCH MORE surface area so the reaction is faster (MUCH FASTER).