8.769 of impure sample containing H2C2O4(s) was dissolved completely in 250 cm3 of distilled
water to form a solution . 25.0cm3 of this
Solution was pipetted out in a conical flask
and titrated with 0.0650 moldm^-3 acidified
K2Cr2O7(aq). 31.80 cm ^3 of K2Cr2O7(aq) was
used . Calculate the percentage purity of
the sample.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

i think that the answer is c