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yussif
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why sodium carbonate against hydrochloric acid titration using phenolphthalein indicator does not go to completion but stops at
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1/2(2x+9)*10=85 multiply through by 1/2 (x+9/2)*10=85 10x+45=85 10x=85-45 10x=40 10x/10=40/10 x=4
