A dilute solution of sulphuric acid is electrolysed using a current of 0.10 A for 2 hours to produce hydrogen and oxygen gas. The total volume of gases produced at STP is . (Nearest integer) [Given: ;

Question

A dilute solution of sulphuric acid is electrolysed using a current of 0.10 A for 2 hours to produce hydrogen and oxygen gas. The total volume of gases produced at STP is . (Nearest integer) [Given: ; molar volume at STP = ]

Canvas Classes · Accepted Answer

Strategy:
 Calculate total gas production from the electrolysis of water. Remember that 2 moles of  and 1 mole of  are produced per 4 moles of electrons transferred.

Step 1: Find total charge ()
, .

Step 2: Moles of gas
For 4 Faradays, 3 moles of total gas () are produced.

Step 3: Volume in cm³
Molar volume at STP .

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