Question

Yellowish-green gas chlorine `(Cl_(2))` can be prepared in the laboratory by heating hydrochloric acid `(HCl, aq)` with pyrolusinte (manganese dioxide, `MnO_(2)`):
`4Cl(aq.) + MnO_(2)(s) rarr Cl_(2)(g) + 2H_(2)O(l) + MnCl_(2)(aq.)`.
How many grams of `HCl` reacts with `5.00g` of manganses dioxide?
A. `4.80g HCl`
B. `8.40g HCl`
C. `6.95g HCl`
D. `5.69g HCl`

Answer 1

Correct Answer - B
`g_(MnO_(2)) rarr n_(MnO_(2)) rarr n_(HCl) rarr g_(HCl)`
`5.00 g_(MnO_(2)) xx (1 mol MnO_(2))/(86.9g MnO_(2)) xx (4 mol HCl)/(1 mol MnO_(2))`
`xx (36.5g HCl)/(1 mol HCl)`
`= 8.40g HCl`