Unit 4-4 Stoichiometry

[qwiz qrecord_id=”aglimme-Unit4-4″]

[q]The first few questions involve the reaction between magnesium and hydrochloric acid. You may find it useful to write down the equation.

[q labels=”bottom”]Balance the following chemical equation:

___Mg(s)+___HCl(aq)___MgCl2(aq)+___H2(g)

[l]1

[fx] No. Please try again.

[f*] Great!

[l]2

[fx] No, that’s not correct. Please try again.

[f*] Excellent!

[l]3

[fx] No, that’s not correct. Please try again.

[f*] Great!

[l]4

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[q]If 4 moles of HCl react with excess Mg how many moles of H2 will be formed?

[c]MQ==

[c]Mg ==

[c]NA==

[c]OA==

[q labels=”bottom”]Fill in the correct ratios to set up the calculation to determine the moles of H2 produced by the reaction of 5.00g of Mg with excess HCl.

 

[l]5.00g Mg

[fx] No. Please try again.

[f*] Good!

[l]1 mol Mg

[fx] No, that’s not correct. Please try again.

[f*] Excellent!

[l]1 mol H2

[fx] No. Please try again.

[f*] Excellent!

[l]24.30g Mg

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[q labels=”bottom”]Fill in the correct ratios to set up the calculation to determine the grams of HCl required to produce 0.78g of H2.

 

[l]1 mol HCl

[fx] No. Please try again.

[f*] Great!

[l]1 mol H2

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[l]2 mol HCl

[fx] No. Please try again.

[f*] Great!

[l]2.016g H2

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[l]36.46g HCl

[fx] No. Please try again.

[f*] Great!

[l]0.78g H2

[fx] No. Please try again.

[f*] Correct!

 

 

[/qwiz]