A volume of 120.0 mL of 0.150 mol L⁻¹ silver nitrate is mixed with 80.0 mL of 0.100 mol L⁻¹ potassium chromate. The precipitation 2 Ag⁺ + CrO₄²⁻ → Ag₂CrO₄(s) may be treated as complete, and the volumes are additive. What is the concentration of Ag⁺ in the final solution?

ChemistryAdvancedHigh School (11–12)Chemical Reactions › Chemical Equations Olympiad

A volume of $120.0\ \text{mL}$ of $0.150\ \text{mol L}^{-1}$ silver nitrate is mixed with $80.0\ \text{mL}$ of $0.100\ \text{mol L}^{-1}$ potassium chromate. The precipitation $2\,\text{Ag}^+ + \text{CrO}_4^{2-} \rightarrow \text{Ag}_2\text{CrO}_4(s)$ may be treated as complete, and the volumes are additive. What is the concentration of $\text{Ag}^+$ in the final solution?

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← In the Kjeldahl method, the nitrogen in 0.700 g of a food is changed to ammonia, which is passed into 50.0 mL of 0.100 mol L⁻¹ sulfuric acid. The acid that is not neutralised needs 20.0 mL of 0.100 mol L⁻¹ NaOH for complete neutralisation. What is the percentage of nitrogen in the food by mass? Atomic masses in g mol⁻¹: H 1.0, N 14.0, S 32.0.A solid mixture of calcium chloride and sodium chloride has mass 1.695 g. It is dissolved in water, and excess silver nitrate precipitates all the chloride as AgCl, of mass 4.305 g. What is the percentage of sodium chloride in the mixture by mass? Atomic masses in g mol⁻¹: Na 23.0, Cl 35.5, Ca 40.0, Ag 108.0. →

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