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How many grams of NaOH(80% purity) will berequired to noutralize 12.2 g benzoic acid?(a) 12.2g(b) 6g(c) 5g(d) 48 |
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Answer» MOLECULAR weight of C6H6CO2H= 123gm so 12.2 gm = appx 0.1 mole now 1 benzoic ACID + 1 NAOH = 1 sodium benzoate + 1 water so to neutralise 1 mole benzoic acid we NEED 1 mole NaOH to neutralise 0.1 mole benzoic acid we need 0.1 mole NaOH molecular mass of NaOH = 40 gm so 0.1 mole NaOH =4 gm purity of sample =80% 100 gm sample contain 80 gm NaOH to obtain 4 gm NaOH we need 5 gm sample |
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