Acid/base equilibria (2014 VCE) | |
1) The pH of the following acid solutions was measured using a pH meter. Solution |
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2) An aerosol can with a volume of 300.0 mL contains 2.80 g of propane gas as a propellant. The warning label says the aerosol may explode at temperatures above 60.0 °C. What is the pressure in the can at a temperature of 60.0 °C? Solution |
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3) If Solution X has a pH of 3 and Solution Y has a pH of 6, we can conclude that Solution
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4) What volume of 0.25 M hydrochloric acid is required to react completely with 40 mL of 0.50 M calcium hydroxide? Solution |
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5) Two Ka values, 10–7 and 10–1, are reported for QH2.
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6) A 2% solution of glycolic acid (2-hydroxyethanoic acid), CH2(OH)COOH, is used in some skincare products. Solution |
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b) The equation for the ionisation of glycolic acid is Solution |
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c) The solubility of glycolic acid is 1.0 × 106 mg per litre at 25 °C. Solution |
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d) 100 mL of the saturated solution of glycolic acid is spilt onto the floor. Solution |
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e) The Material Safety Data Sheet (MSDS) for a concentrated solution of glycolic acid states that it is corrosive to the eyes, skin and respiratory system, and that it is harm ful if a concentrated solution of it is ingested or inhaled. Solution |
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