Question

Do Both Please

it took .0093 moles NaOH to neutralize an impure sample of citric acid. how many grams of citric acid are in the sample H6C6H5O7+3NaOH -> 3H2O + Na3C6H5O7

which if the following is true in this acid base titration when the moles of hydrogen ion equal the moles of hydroxide ion? naturalization equivalency a salt is produced all the above

Answer 1

H3C6H5O7+3NaOH -----------------> 3H2O + Na3C6H5O7

here the mole are for the citric acid is 1 and the NaOH are 3 moles

from the equation

3 mol NaOH ----------------------------> 1 mol H3C6H5O7

0.0093 mol ------------------------------->?

=> 0.0093 * 1 / 3

=> 0.0031 moles

mass of citric acid is required is = moles * molar mass

mass = 0.0031 mol * 192.124g/mol => 0.59558 grams

answer => 0.6 grams

when the no of moles of the H+ are equal to the OH- ion and then neutralization reaction will occurs i.e the total amount of the H+ are reacted with the OH- and remains unreacted in the reaction