Mole Concept problem
No, no, no... it is not a rat problem. Lol....
O level Acids and Bases MCQ
Acids and Bases 1. Which one of the following can be added to lemon juice to increase its pH? A lime juice B baking powder C concentrated hydrochloric acid D ethanoic acid 2. Which one of the following can react with both acids and alkalis? A sulphur dioxide B carbon monoxide C zinc oxide D sodium oxide 3. Which one of the following has the highest pH? Aqueous ammonia is a weak alkali while sodium hydroxide is a strong alkali. A 1.00 mol/dm3 aqueous ammonia B 2.00 mol/dm3 aqueous ammonia C 1.50 mol/dm3 sodium hydroxide D 5.00 mol/dm3 ethanoic acid 4. Which one of the following acids require the largest volume of 1.00 mol/dm3 potassium hydroxide to neutralize? A 1.50 dm3 0.20 mol/dm3 HCl B 1.00 dm3 0.50 mol/dm3 H3PO4 C 1.00 dm3 1.00 mol/dm3 HCl D 1.00 dm3 1.30 mol/dm3 CH3COOH 5. What volume of 1.00 mol/dm3 rubidium hydroxide, RbOH, is required to neutralize 25.0 cm3 of 0.500 mol/dm3 hydrochloric acid? A 12.5 cm3 B 25.0 cm3 C
Clue : Find the no. of moles of copper(II) sulfate, then using mol ration, find no. of moles of copper(II) sulfide, CuS. Next, find mass of CuS.
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