Metals And Reactivity Series Flashcards

Question

What is a displacement reaction?

Answer 1

When a more reactive metal takes the place of a less reactive metal in a compound.

Answer 2

K (please) Na (send) Li (little) Ca (Charlie’s) Mg (monkeys) Al (and) Zn (zebras) Fe (in) Sn (tin) Cu (cages)

Answer 3

A rock which contains a metal compound from which the metal can be extracted.

Answer 4

Electrolysis (for metals more reactive than carbon). Reduction via heating with carbon (for metals less reactive than carbon).

Answer 5

The use of plants to absorb metal compounds from soil as part of metal extraction.

Answer 6

Plants (e.g. rapeseed) are grown on ground that contains low-grade ores, so the metal is removed from the ore and enters the plant. The plants are harvested, dried, and then burned to produce an ash, which is rich in metal compounds. An acid such as sulfuric acid is added to the ash and insoluble metal compounds react to produce a solution containing soluble copper compounds. The solution is called a leachate. The metal can then be obtained by adding scrap iron to the leachate solution, and a displacement reaction will occur. For example, to extract copper. Fe (s) + Cu 2+ (aq) -> Fe 2+ (aq) + Cu (s) The iron is more reactive than the copper and so the copper is displaced my the iron.

Answer 7

Phytomining avoids the noise and dust pollen, and the large amount of energy required for traditional mining, thus is better for the environment. Energy is also produced as the plants are burned. However, it is a slow process. Plants take time to grow and can only be harvested at certain times of the year.

Answer 8

Cut a piece of sodium and place it in water. It is very soft and shiny when freshly cut. It shoot’s across the surface of the water, forms a small ball, floats, fizzes and dissolves. Drip indicator solution into the water. Green blue, pH 7.7 Repeat with lithium and potassium. Lithium is less reactive than sodium and potassium is more reactive than sodium. Collect a test tube and half fill with water. Add 4 granules of calcium and hold a second, dry test tube over it upside down to collect the gas evolved. Bubbles of gas are released and the test tube feels warm, exothermic reaction. Calcium sinks and rises. Test the gas by inserting a lit splint into the test tube. Makes a squeaky pop, hydrogen. Add 3 drops of indicator into the solution. It is green blue, an alkali. Repeat the experiment using magnesium. Less reactive, bubbles of hydrogen gas form slower. More vigorous with steam.

Answer 9

Half full separate test tubes with copper (II) sulfate, magnesium sulfate and zinc sulfate solutions. Add a piece of iron to each tube. Leave for 3 minutes, record observations.

Answer 10

Half fill separate test tubes with copper (II) sulfate, magnesium sulfate, and iron (II) sulfate solutions. Add a piece of zinc to each test tube. Leave for 3 minutes and record observations.

Answer 11

Half fill test tubes with zinc sulfate, magnesium sulfate and iron (II) sulfate solutions. Add a piece of copper to each test tube. Leave for 3 minutes.

Answer 12

Half-fill separate test tubes with copper (II) sulfate, zinc sulfate and iron sulfate solutions. Add a piece of magnesium to each test tube. Leave for 3 minutes and record observations.

Metals And Reactivity Series Flashcards

(36 cards)