Compound B is a chloride of a Period 3 element.
A student carries out the following two-step procedure to determine the empirical formula of compound B.
Step 1 The student dissolves exactly 6.00×10−4 mol6.00 \times 10^{-4} \text{ mol}6.00×10−4 mol of compound B in deionised water, forming a clear, colourless solution.
Step 2 This solution is titrated against a silver nitrate solution, requiring exactly 80.0 cm380.0 \text{ cm}^380.0 cm3 of 1.50×10−2 mol dm−3 AgNO3(aq)1.50 \times 10^{-2} \text{ mol dm}^{-3} \text{ AgNO}_3\text{(aq)}1.50×10−2 mol dm−3 AgNO3(aq) to completely precipitate the chloride ions as a white solid.
Write an ionic equation, including state symbols, for the precipitation reaction occurring in Step 2.
Determine the chemical formula of compound B, showing your working.
199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.