devozeeba 2.1 Stel Newton se Eerste Wet in woorde. (2) 2.2 Teken ‘n benoemde vrye kragtediagram (vrye liggaamdiagram) vir die blok. (4) 2.3 Bereken die grootte van krag F. (4) Krag F word verwyder wanneer die blok punt X op die oppervlak bereik. Die blok houaan om teen die oppervlak op te beweeg en kom vir … Read more
1.1 Beskou die stelling hieronder.Die loodregte krag uitgeoefen deur ‘n oppervlak op ‘n voorwerp in kontak met die oppervlak.Watter EEN van die volgende kragte word deur die stelling hierbo gedefinieer?A. NormaalkragB. Resultante kragC. WrywingskragD. Gravitasiekrag (2) 1.2 Twee balle met massas m en 2m word gelyktydig vanaf dieselfde hoogte bodie grond laat val. Ignoreer lugweerstand.Watter … Read more
10.1 The incomplete equations below show the four steps involved in the industrial preparation of sulphuric acid (H2SO4). A and B represent two compounds. Write down the NAME or FORMULA of:10.1.1 Compound A (1) 10.1.2 Compound B (1) 10.1.3 The catalyst used in Step II (1) The sulphuric acid formed in Step IV is used … Read more
The diagrams below show two electrochemical cells in which carbon electrodes are used. In cell A, concentrated copper (II) chloride solution is used and in cell B, liquid aluminium oxide is used. 9.1 What type of electrochemical cell, ELECTROLYTIC or GALVANIC, is shownabove? Give a reason for the answer. (2) 9.2 Write down the:9.2.1 Half-reaction … Read more
8.1 When a piece of sodium metal (Na) is added to water in a test tube, hydrogen gas is released. When phenolphthalein indicator is added to the test tube, the solution turns pink. 8.1.1 Define the term reduction in terms of electron transfer. (2) 8.1.2 Write down the reduction half-reaction. (2) 8.1.3 Write down the … Read more
Learners prepare a solution of known concentration by dissolving 2 g pure sodium hydroxide crystals, NaOH, in water in a 250 cm3 volumetric flask.7.1 Write down the term for the underlined phrase. (1) 7.2 Calculate the:7.2.1 Concentration of the sodium hydroxide solution (4) 7.2.2 pH of the solution (4) The learners now react 1,5 g … Read more
Pure hydrogen iodide gas, HI(g), of concentration 1 mol∙dm-3 , is sealed in a 500 cm3container at temperature T. The reaction reaches equilibrium according to the following balanced equation: 6.1 Define the term chemical equilibrium. (2) 6.2 The graph below shows how the concentrations of the reactant and products vary with time during the reaction. … Read more
Two experiments, I and II, are conducted to investigate one of the factors that affects the rate of the reaction of aluminium carbonate, Aâ„“2(CO3)3, with EXCESS hydrochloric acid, HCâ„“. The balanced equation for the reaction is: The apparatus used is shown below. The reaction conditions used for each experiment are as follows: Experiment I:100 cm3 … Read more
4.1 The flow diagram below shows the conversion of propane to propan-2-ol. 4.1.1 State ONE reaction condition for Step 1. (1) 4.1.2 Write down the NAME or FORMULA of the INORGANIC productformed in Step 1. (1) 4.1.3 Name the TYPE of substitution reaction represented by Step 2. (1) 4.1.4 Write down the NAME or FORMULA … Read more