![What mass of copper would be deposited by a current of 1. 0 ampere passing for 965 seconds through copper (ll) tetraoxosulphate (IV) solution? [Cu = 63.5; 1F = 96500C]](https://erudites.ng/wp-content/uploads/2020/06/past-questions-and-answers.jpg)
by Sunday | Aug 21 | Chemistry WAEC
A. 0.318g B. 0.635g C. 18g D. 6.35g E. 9.65g Correct Answer: Option A Explanation Cu²+ + 2e- → Cu, From the equation 2 Faraday will liberate 63.5gm of copper. The quantity of electricity passed (Q) Q = 1. 0 965 = 965 coulomb :. 2 x 96500 → 63.5, 965 → x. x = 965 /...
by Sunday | Aug 21 | Chemistry WAEC
A. Glucose solution B. Aqueous copper (ll) tetraoxosulphate (IV) C. Dilute sodium chloride solution D. Concentrated hydrochloric acid E. Dilute copper (ll) chloride solution Correct Answer: Option C – Aqueous copper (ll) tetraoxosulphate...
by Sunday | Aug 21 | Chemistry WAEC
A. Dehydrating agent B. Oxidising agent C. Bleaching agent D. Acid E. Precipitant Correct Answer: Option B – Oxidising agent
by Sunday | Aug 21 | Chemistry WAEC
A. Action of an acid on a metal B. Double decomposition C. Neutralisation D. Action of an acid on a trioxocarbonate (IV) E. Action of an acid on an oxide Correct Answer: Option B – Double decomposition
by Sunday | Aug 21 | Chemistry WAEC
A. Positive reaction to the brown ring test B. Ability to dissolve in cold water C. Decomposition on being strongly heated D. Production of effervescence with saturated Na2CO3 solution E. Evolution of gas with concentrated H2SO4 and copper turnings Correct Answer:...
by Sunday | Aug 21 | Chemistry WAEC
A. Na2O B. SO3 C. NO2 D. CO2 E. CuO Correct Answer: Option E – CuO
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