11. Group 17
A section of Chemistry, 9701
Listing 10 of 617 questions
Hydrogeniodideisaddedtoanevacuatedreactionvessel.Thevesselissealedandwarmed.A decompositionreactionoccurs.Hydrogenandiodineareformed.Somehydrogeniodideremains. Whenequilibriumisestablished,thetotalpressureis1.20s105Pa.Thepartialpressureofhydrogen is4.00s103Pa. Hydrogeniodide,hydrogenandiodineareallgaseousundertheconditionsused. WhatisthevalueofKpfortheequilibriumatthistemperature,assumingthedecompositionisthe forwardreaction?
9701_s23_qp_12
MCQ
2023
Paper 1, Variant 2
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Chlorine is a reactive element. It forms many compounds. Complete Table 2.1 to show the maximum oxidation number of the elements Na to P in their chlorides. Table 2.1 element Na Mg Al Si P maximum oxidation number State what determines the maximum oxidation number of elements in Period 3. An excess of cold water is added to the chloride of silicon. Write an equation for the reaction between an excess of cold water and the chloride of silicon. Suggest the pH of the solution produced in . An excess of cold water is added to the chloride of phosphorus. Write an equation for the reaction between an excess of cold water and the chloride of phosphorus. Suggest the pH of the solution produced in . Write an equation for the reaction of chlorine with water. Write an equation for the reaction of chlorine with hot NaOH. Bleach is used as a cleaning product to kill bacteria. It is made by adding compounds like sodium chlorate(, NaCl O, to water. Identify the formula of the ion present in bleach that kills bacteria. Sodium chlorate(, NaCl O, reacts with hydrogen peroxide to produce sodium chloride, water and oxygen gas. Construct an equation for this reaction. A sample of bleach W contains an unknown concentration of sodium chlorate(. 10.0 cm3 of W is diluted with distilled water to make a total volume of 100 cm3 of bleach solution. 25.0 cm3 of this diluted bleach solution is added to an excess of hydrogen peroxide and the volume of gas produced measured under room conditions. The experiment is repeated and on average 25.0 cm3 of diluted bleach solution produces 42.0 cm3 of gas. Calculate the concentration, in g dm–3, of sodium chlorate(in W. concentration of NaCl O in W = g dm–3
9701_s23_qp_22
THEORY
2023
Paper 2, Variant 2
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What do you understand by the term standard electrode potential? By reference to relevant E data in the Data Booklet, explain how the halogen/halide electrode potentials relate to the relative reactivity of the halogens as oxidising agents. Use data from the Data Booklet to construct redox equations, and calculate the standard cell potentials, for the reactions between Acidified H2O2and KI, Cl2+ SO2. Use data from the Data Booklet to predict the likely product of the reaction between I2and tin metal, writing a balanced equation for the reaction. Use
9701_w05_qp_4
THEORY
2005
Paper 4, Variant 0
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Questions Discovered
617