Question

A piece of zinc is added to 1000cm3 of 0.2mol/dm3 hydrochloric acid. After effervescence had stopped, 28cm3 of the resulting solution required 17cm3 of 0.08mol/dm3 sodium trioxocarbonate(IV) solution for complete neutralization.
Calculate the mass of the zinc added. [Zn =65; H=1; Cl=35.5; Na=23; C=12; O=16]

Answer 1

Answer:

Explanation:

EQUIVALENT OF HCL = 400

EQUIVALENT OF 28 CM^3 IS 1.36

EQUIVALENT OF 1000 CM^3 IS 48.57

EQUIVALENT USED = 351.43

MOLES = 0.175715

WEIGHT = 11.5 GM