Answer to Question #161751 in Chemistry for Jue

Question

calculate the sodium in a 0.721g detergent sample. final yield is 0.320g nap2o4

Answer 1

The mass of sodium in the NaP₂O₄ sample:

m(Na) = m(NaP₂O₄) × Mr(Na) / Mr(NaP₂O₄) = 0.320 g × 23 g / 149 g/mol = 0.05 g

The percent of spdium in a detergent sample:

% Na = (m(Na) / Msample) × 100 % = (0.05 g / 0.721 g) × 100 % = 3.6 %

Answer: 3.6 %