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Compare the concentrations of some alkalis in saturated solutions.
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Compare the concentrations of some alkalis in saturated solutions. The Nature of the Chemicals Calcium hydroxide is a strong alkali with a pH of around 10. Ca(OH) 2 has a low solubility but dissociates into ions in water. Ca(OH)2 (s) + H20 Ca²+ (aq) + 2OH¯ (aq) Calcium hydroxides and other metal hydroxides react with acids like hydrochloric acid. Ca(OH)2 (aq) + 2HCl (aq) CaCl2 (s) + 2H2O Hydrochloric acid is a strong acid with a pH of around 2, because it fully dissociates into ions in water HCl (g) + aq H+ (aq) + Cl¯ (aq) Analysis Technique A titration would be the most suitable method to determine the concentration of 4 metal hydroxides. Phenolphthalein would be the most suitable indicator for a reaction between a strong acid and alkali. Phenolphthalein is an organic compound (C20H14O4). The compound is colourless in acidic solution and pinkish in basic solution, with the transition occurring around pH 9. I am supplied with...
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