Rates of Chemical Reaction Quiz

 Iron reacts with hydrochloric acid to form iron(II) chloride and hydrogen gas. 2g of iron is added to 100cm3 of dilute hydrochloric acid. Which conditions produces the fastest reaction? 

 A gas was produced in a chemical reaction. The total volume of gas formed was measured at regular time intervals. Which graph would you expect the results to be like? 

 Limestone or marble chips are made of the chemical calcium carbonate (1). They both dissolve in hydrochloric acid (2), to produce a solution of calcium chloride (3), water (4) and carbon dioxide (5). Which of 1 to 5 is the 'salt' in the reaction? 

 An experiment was carried out at a temperature of 25oC by dissolving 0.2g of small limestone granules into 30cm3 of hydrochloric acid. The acid concentration was 1.0 mol/dm3 and in excess so all the limestone dissolved. The reaction was followed by measuring the volume of carbon dioxide given off over a period of 6 minutes. A 2nd experiment was done in an identical manner but using 0.2g of limestone lumps. Which of the graphs W, X, Y or Z might you expect for the results? 

   A large amount of calcium carbonate (excess) is added to a small amount of dilute hydrochloric acid. Which will double the volume of carbon dioxide finally formed?  

 Which of the following gases is formed when a metal reacts with an acid? 

 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 6 cm3/min in the first minute of the reaction? 

 For reactions to occur, the particles of the reactants must collide. The fewer the collisions that take place, the slower the rate of a reaction. Which DECREASES the frequency of collision between reactant particles? 

 Which of the following is formed when a carbonate reacts with an acid? 

 A small quantity of calcium carbonate is added to a large excess acid. Carbon dioxide gas is formed. Which of the following will halve the amount of carbon dioxide formed? 

 Limestone or marble chips are made of the chemical calcium carbonate (1). They both dissolve in hydrochloric acid (2), to produce a solution of calcium chloride (3), water (4) and carbon dioxide (5). In what form would you add the marble to slow down the reaction? 

 For reactions to occur, the particles of the reactants must collide. The fewer the collisions that take place, the slower the rate of reaction. Which INCREASES the frequency of collision between reactant particles? 

 An experiment was carried out at a temperature of 25oC by dissolving 0.2g of small limestone granules into 30cm3 of hydrochloric acid. The acid concentration was 1.0 mol/dm3 and in excess so all the limestone dissolved. The reaction was followed by measuring the volume of carbon dioxide given off over a period of 6 minutes. A 2nd experiment was done in an identical manner but using 0.4g of the same limestone granules. Which of the graphs W, X, Y or Z might you expect for the results? 

 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? 

 Calcium carbonate in the form of limestone dissolves in hydrochloric acid and giving off carbon dioxide gas. Which conditions would produce the fastest reaction? 

 An experiment was carried out at a temperature of 25oC by dissolving 0.2g of small limestone granules into 30cm3 of hydrochloric acid. The acid concentration was 1.0 mol/dm3 and in excess so all the limestone dissolved. The reaction was followed by measuring the volume of carbon dioxide given off over a period of 6 minutes. A 2nd experiment was done in an identical manner but using 0.1g of the same limestone granules. Which of the graphs W, X, Y or Z might you expect for the results? 

 An experiment was carried out at a temperature of 25oC by dissolving 0.2g of small limestone granules into 30cm3 of hydrochloric acid. The acid concentration was 1.0 mol/dm3 and in excess so all the limestone dissolved. The reaction was followed by measuring the volume of carbon dioxide given off over a period of 6 minutes. A 2nd experiment was done in an identical manner but using acid of 2.0mol/dm3 concentration. Which of the graphs W, X, Y or Z might you expect for the results? 

 On mixing two reacting solutions a solid precipitate was formed. The mass of the solid precipitate was measured at regular time intervals. Which graph would you expect the results to be like?