Two chemicals A and B react completely to form C and D. If 10.5g of A and 12.7g of B react together and 15.3g of C are produced .What is the amount of D?
Answers
Answer:



What volume of 3.05 M HCl(aq)will react with 25.0 g Zn(s) in the reactionZn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)?
Chemistry Stoichiometry
1 Answer

Stefan V.
Apr 23, 2016
251 mL
Explanation:
Start by writing down the balanced chemical equation that describes this single replacement reaction
Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)↑⏐
Now, notice that the two reactants react in a 1:2mole ratio. This tells you that the reaction will always consume twice as many moles of hydrochloric acid than moles of zinc metal.
As you know, a solution's molarity tells you how many moles of solute, which in your case will be hydrochloric acid, HCl, are present per liter of solution.
The hydrochloric acid solution is said to have a molarity of 3.05 mol L−1. This means that you get 3.05 moles of hydrochloric acid for every 1 Lof solution. Keep this in mind for later.
You know that the reaction must consume 25.0 gof zinc metal. You can convert this mass to molesby using zinc's molar mass
25.0g⋅1 mole Zn65.38g=0.3824 moles Zn
In order for this many moles of zinc to react, you'd need
0.3824moles Zn⋅2amoles HCl1mole Zn=0.7648 moles HCl
Since you know that