The Language of Chemistry — CHEMISTRY STD 9 — Question
ICSE BoardEnglish MediumSTD 9CHEMISTRYThe Language of Chemistry2 Marks
Question
What information do the following chemical equations convey? $Mg+2HCl \rightarrow MgCl_2+H_2$
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Answer
This equation conveys the following information:
Magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen gas.
24 g of magnesium reacts with 2(1 + 35.5) = 73 g of hydrochloric acid to produce (24 + 71), i.e. 95 g of magnesium chloride.
Hydrogen produced at STP is 22.4litres.
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