Question

Question:

% Analyte = weight of Analyte/weight of sample × G.F ×100/1

G.F is the gravimetric factor = substance sought / substance known.

Calculations

1. Calculate the % sodium in a 0.721g detergent sample final Field is 0.320g NaP2O4.

2.A 0.2025 g sample consisting of only BaCl2 and KCl required 20.25 mL of 0.1200 M AgNO 3 solution for the quantitative precipitation of chloride.

Calculate the %K in the sample

Answer 1

$\% Analyte = \dfrac{weight\ of\ Analyte}{weight of sample} × G.F ×\dfrac{100}{1} ​$

$G.f=\dfrac{22.98}{148.93}$

$=0.15$

Substituting the value;

$\%Na=\dfrac{0.721}{0.320}*0.15*100\newline \%of sodium =33.7$