Marble Chips
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Image462.gif Which mixture will enable the fastest reaction to take place between solid calcium carbonate (marble chips) and dilute hydrochloric acid? [rr-13]
YES concentrated acid, high temperature, small chips ? high temperature, small chips, dilute acid ? large chips, concentrated acid, low temperature ? low temperature, small chips, dilute acid
Image50.gifImage51.gifImage52.gifSodium thiosulphate solution reacts with hydrochloric acid to form sodium chloride, sulphur dioxide, sulphur and water. The reaction can be followed by measuring the time it takes for enough of the sulphur precipitate to form to obscure a black cross marked on white paper. Which will decrease the time it takes for the black cross to disappear? [rr-22]
NO cool the mixture …show more content…
26 30 33 36 38 39 40 40 40
What is the most likely value of the missing reading in cm3 of carbon dioxide? [rr-40]
NO 18
NO 23
NO 24 ? 21
Image483.gif An experiment was carried out to dissolve small limestone granules into hydrochloric acid. Carbon dioxide gas is formed and was collected in a gas syringe. The initial results are marked as the 'original experiment'. The experiment was repeated after varying the reaction conditions (ie mass of limestone, size of limestone pieces, temperature or acid concentration). The speed of the reaction can be given in cm3/min, ie the speed at which carbon dioxide is formed. Which experiment is going at an approximate average speed of 3 cm3/min in the first minute of the reaction? [rr-60]
NO graph line for experiment Y
NO graph line for experiment W ? graph line for experiment Z
NO graph line for experiment X
Image483.gifCalcium carbonate (limestone) were dissolved in hydrochloric acid under five different experimental conditions.
The carbon dioxide gas formed was collected in a gas syringe and the total volume of gas was recorded for the first six
Image462.gif Which mixture will enable the fastest reaction to take place between solid calcium carbonate (marble chips) and dilute hydrochloric acid? [rr-13]
YES concentrated acid, high temperature, small chips ? high temperature, small chips, dilute acid ? large chips, concentrated acid, low temperature ? low temperature, small chips, dilute acid
Image50.gifImage51.gifImage52.gifSodium thiosulphate solution reacts with hydrochloric acid to form sodium chloride, sulphur dioxide, sulphur and water. The reaction can be followed by measuring the time it takes for enough of the sulphur precipitate to form to obscure a black cross marked on white paper. Which will decrease the time it takes for the black cross to disappear? [rr-22]
NO cool the mixture …show more content…
26 30 33 36 38 39 40 40 40
What is the most likely value of the missing reading in cm3 of carbon dioxide? [rr-40]
NO 18
NO 23
NO 24 ? 21
Image483.gif An experiment was carried out to dissolve small limestone granules into hydrochloric acid. Carbon dioxide gas is formed and was collected in a gas syringe. The initial results are marked as the 'original experiment'. The experiment was repeated after varying the reaction conditions (ie mass of limestone, size of limestone pieces, temperature or acid concentration). The speed of the reaction can be given in cm3/min, ie the speed at which carbon dioxide is formed. Which experiment is going at an approximate average speed of 3 cm3/min in the first minute of the reaction? [rr-60]
NO graph line for experiment Y
NO graph line for experiment W ? graph line for experiment Z
NO graph line for experiment X
Image483.gifCalcium carbonate (limestone) were dissolved in hydrochloric acid under five different experimental conditions.
The carbon dioxide gas formed was collected in a gas syringe and the total volume of gas was recorded for the first six