Acids and metals

9.A student adds a metal to an acid and observes fizzing. Which metal is most likely being used?

10.What type of compound is formed when a metal reacts with an acid?

11.Which gas is produced when a metal reacts with an acid?

12.A reaction between calcium and hydrochloric acid is more vigorous than the reaction between magnesium and hydrochloric acid. Which statement explains this?

13.A student adds a piece of metal X to dilute hydrochloric acid. The temperature rises from 21°C to 35°C, and fizzing is observed. Which statement about metal X is most likely correct?

14.In an experiment, 0.5 g of magnesium ribbon is added to 50 cm³ of 1 mol/dm³ hydrochloric acid. The volume of hydrogen gas collected is 480 cm³ at room temperature and pressure. Which calculation gives the number of moles of hydrogen produced? (Molar volume at RTP = 24 dm³/mol)

15.The table shows the results of adding four different metals to dilute hydrochloric acid. | Metal | Observation | |-------|-------------| | W | No reaction | | X | Slow fizzing | | Y | Vigorous fizzing, temperature rises quickly | | Z | Very slow fizzing over time | Which metal is most reactive?

16.A student reacts 0.1 mol of magnesium with excess hydrochloric acid. What mass of magnesium chloride is produced? (Ar: Mg = 24, Cl = 35.5)

17.Which salt is produced when zinc reacts with sulfuric acid?

18.A student places a piece of copper into nitric acid. Which observation is correct?

19.In an experiment, excess magnesium is added to 25 cm³ of 2 mol/dm³ hydrochloric acid. Which volume of hydrogen gas is produced at RTP? (Molar volume = 24 dm³/mol)

20.The graph shows the volume of hydrogen gas produced over time when three different metals react with excess acid. Which metal is the most reactive? [Diagram: graph with three curves labelled P, Q, R; volume on y-axis, time on x-axis; P rises steeply and plateaus quickly, Q rises moderately, R rises slowly]

21.What is the general word equation for the reaction between a metal and an acid?

22.A student adds a metal to an acid and observes that the temperature increases. Which statement explains why the temperature rises?

23.Which of the following word equations is correct for the reaction between aluminium and nitric acid?

24.A student adds 0.5 g of calcium to excess hydrochloric acid. Which gas is produced and what is its test?

25.In an experiment, a student adds 0.5 g of magnesium ribbon to excess hydrochloric acid and collects the hydrogen gas produced. After the reaction finishes, the student measures the volume of gas. Which piece of apparatus is most suitable for measuring the volume of hydrogen gas?

26.A student sets up an experiment to compare the rates of reaction of magnesium and zinc with dilute hydrochloric acid. They use equal masses of each metal and excess acid. Which of the following would be the most reliable way to measure the rate of reaction?

27.In an experiment, a student adds excess zinc to 25 cm³ of 1 mol/dm³ hydrochloric acid. Which of the following changes would increase the rate of reaction?

28.A student reacts 0.05 mol of calcium with excess hydrochloric acid. What volume of hydrogen gas is produced at room temperature and pressure (molar volume = 24 dm³/mol)?

29.A student adds a piece of metal X to dilute hydrochloric acid. The temperature rises from 20°C to 30°C, and fizzing is observed. Which statement about metal X is correct?

30.A student wants to test for hydrogen gas produced in a reaction between a metal and an acid. Which test is correct?

31.In an experiment, a student adds 0.24 g of magnesium to excess hydrochloric acid. The hydrogen gas collected occupies 240 cm³ at room temperature and pressure. What is the molar volume of hydrogen under these conditions? (Ar: Mg = 24)

32.A student adds iron filings to dilute sulfuric acid. Which salt is produced?

33.Which of the following metals will NOT react with dilute hydrochloric acid?

34.A student adds 0.1 mol of aluminium to excess nitric acid. Assuming the reaction goes to completion, which mass of aluminium nitrate is produced? (Ar: Al = 27, N = 14, O = 16)

35.The diagram shows the apparatus used to investigate the reaction between magnesium and hydrochloric acid. Which labelled part is used to collect the hydrogen gas?

36.When a metal reacts with an acid, which of the following is always produced?

37.What salt is produced when zinc reacts with sulfuric acid?

38.Which word equation correctly represents the reaction between aluminium and nitric acid?

39.Why is there no reaction when gold is placed in nitric acid?

40.A student adds calcium to hydrochloric acid. Which observation indicates a more vigorous reaction compared to magnesium?

41.When a metal reacts with an acid, the temperature of the mixture always decreases.

42.Copper does not react with sulfuric acid because copper is less reactive than hydrogen.

43.Match each acid to the type of salt it produces when reacting with a metal.

44.Arrange the following metals in order of increasing reactivity with acids (least reactive first).

45.Which of the following metals will NOT react with dilute hydrochloric acid? (Select all that apply.)

46.Which word equation correctly represents the reaction between aluminium and sulfuric acid?

47.What gas is produced when a metal reacts with an acid?

48.Which of the following are signs that a chemical reaction is taking place when a metal is added to an acid? (Select all that apply.)

49.Arrange the following reactions in order of increasing vigour (least vigorous first).

50.A student adds a piece of metal to dilute hydrochloric acid and observes a very vigorous reaction with effervescence and the metal disappears quickly. Which metal is most likely being used?

51.Complete the general word equation for the reaction between a metal and an acid.

52.Complete the word equation for the reaction of magnesium with hydrochloric acid.

53.State how the temperature of the products compares to the temperature of the reactants when magnesium reacts with hydrochloric acid.

54.Other than a temperature change, state another way we could tell a chemical reaction has taken place when a metal reacts with an acid.

55.Describe why there would be no reaction between gold and hydrochloric acid.

56.Some calcium now reacts with hydrochloric acid. State and explain how the reaction would compare to that of magnesium and hydrochloric acid.

57.Complete the word equation for the reaction between calcium and hydrochloric acid.

58.Complete the word equation: calcium + sulfuric acid → ___ + ___

59.Complete the word equation: zinc + hydrochloric acid → ___ + ___

60.Complete the word equation for the reaction between iron and sulfuric acid.

61.A student adds 0.1 mol of magnesium to excess hydrochloric acid. What mass of magnesium chloride is produced? (Ar: Mg = 24, Cl = 35.5)

62.A student adds 0.1 mol of magnesium to excess hydrochloric acid. What mass of magnesium chloride is produced? (Ar: Mg = 24, Cl = 35.5)