Question #161659

Question:

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

weight of sample

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

Expert's answer

1. 0.32 x 23 x 100% /149 x 0.721= 6,85103651 %.

2. x+2y=0.02025 x 0.12

74.5x + 208y= 0.2025.

y= 0,00036381356.

x= 0,00206618644.

0,00206618644 x 39 x 100%/0.2025= 39,7932203 %

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