Grab a calculator and a copy of the periodic table (This test has only 10 questions, but may take 15 - 20 mins). 1. The correct formula for the concentration of a solution in mol/dm3 is.. A.   concentration = number of moles x volume in cm3 B.   concentration = number of moles x volume in dm3 C.   concentration = number of moles ÷ volume in cm3 D.   concentration = number of moles ÷ volume in dm3 ? A B C D 2. Calculate the concentration of a solution made by dissolving 0.40 moles of potassium nitrate in water producing 100 cm3 of solution. A.   40 mol/dm3 B.   4.0 mol/dm3 C.   0.040 mol/dm3 D.   0.0040 mol/dm3 ? A B C D 3. Which solution contains the greatest number of moles? A.   20 cm3 of 2.0 mol/dm3 hydrochloric acid B.   40 cm3 of 1.0 mol/dm3 hydrochloric acid C.   60 cm3 of 1.0 mol/dm3 sodium hydroxide D.   80 cm3 of 0.5 mol/dm3 sodium hydroxide ? A B C D 4. 1.0dm3 of ethanoic acid solution, CH3COOH, contains 6.0 g of ethanoic acid [Mr value of CH3COOH = 60]. The concentration of the ethanoic acid solution, in mol/dm3, is.. A.   0.1 B.   0.6 C.   1.0 D.   10 ? A B C D 5. Sodium hydroxide solution can be neutralized using dilute ethanoic acid. The equation for the reaction is:                             NaOH(aq) + CH3COOH(aq) → CH3COONa(aq) + H2O(l) Calculate the volume of 0.200 mol/dm3 ethanoic acid needed to exactly neutralize 0.0025 moles of sodium hydroxide solution. A.   0.0125 cm3    B.   1.25 cm3     C.   12.5 cm3 D.   12.5 dm3 ? A B C D Q6-7: A student plans to titrate 25.0 cm3 of sulfuric acid with 0.200 mol/dm3 sodium hydroxide solution using phenolphthalein as an indicator. The piece of apparatus which should be used to measure the.. 6. ..volume of sulfuric acid is a ? burette beaker measuring cylinder pipette . 7. ..volume of sodium hydroxide is a ? burette beaker measuring cylinder pipette . 8. 0.30 moles of barium chloride solution was added to 0.20 moles of magnesium sulfate solution in the following precipitation reaction: BaCl2(aq) + MgSO4(aq) → BaSO4(s) + MgCl2(aq) How many moles of barium sulfate, BaSO4, would be produced? A.   0.20 B.   0.25 C.   0.30 D.   0.50 ? A B C D Q9-10: A student added excess sodium hydrogen carbonate to 35.0 cm3 of 0.500 mol/dm3 citric acid solution. She measured the temperature change and calculated that 1500 J of energy was absorbed during the reaction. 9. How many moles of citric acid were used? A.   17.5       B.   14.3 C.   0.0175 D.   0.0143 ? A B C D 10. Calculate the enthalpy change for the reaction, ΔH, in kilojoules per mole of citric acid. A.   +85.7 kJ/mol B.   -85.7 kJ/mol C.   +104.9 kJ/mol D.   -104.9 kJ/mol ? A B C D