Titration of an unknown amount of ascorbic acid, #C_6H_8O_6#, requires 25.4 mL of 0.100 M sodium hydroxide, #NaOH#. How do you calculate the grams of the ascorbic acid?

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#HC_6H_7O_(6(aq)) + NAOH_((aq)) rightleftharpoons NaC_6H_7O_(6(aq)) + H_2O_((l))#

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Answer 1 · 2016-12-01T16:09:35

#"Mass of ascorbic acid "= 25.4xx10^-3Lxx0.100*mol*L^-1=25.4xx10^-4*molxx176.12*g*mol^-1~=0.5*g#

You have supplied the stoichiometric equation, and it specifies 1:1 molar equivalence between ascorbic acid and sodium hydroxide.

And thus.........

#"Mass of ascorbic acid"# #=#

#"moles of ascorbic acid"xx"molar mass of ascorbic acid"#

#=25.4xx10^-4*molxx176.12*g*mol^-1~=0.5*g#