Quelpr

Other parts of this question

  1. 1(a)(i)For EACH temperature in Table 1, calculate the mass of potassium iodide that was dissolved in the beaker of water, and record the value in the space provided.[2 marks]
  2. 1(a)(ii)On Figure 1, plot mass of salt dissolved (solubility) against temperature, and draw a straight line through the points.[3 marks]
  3. 1(a)(iii)From the graph, determine the solubility (in grams per 100 cm³) of potassium iodide at 70 °C.[1 mark]
  4. 1(a)(iv)100 cm³ of distilled water is saturated with potassium iodide at 70 °C. Calculate the mass of potassium iodide that will be precipitated out from solution, if…[2 marks]
  5. 1(a)(v)Calculate the concentration (mol dm⁻³) of a saturated solution of potassium iodide at 30 °C. (RAM: K = 39, I = 127).[3 marks]
  6. 1(c)(i)A suggested list of apparatus and chemicals which you will use in obtaining the pure solid sample of EITHER of the two salts.[1 mark]
  7. 1(c)(ii)An outline of the steps for the procedure to be used.[3 marks]
  8. 1(c)(iii)List the MAIN observations that will be expected at EACH stage of the experiment.[2 marks]
  9. 1(d)Complete the table by inserting the appropriate inferences.[4 marks]

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