C4 The Reactivity Series (pg 132)

Question 1

What is ‘The Reactivity Series’?

Answer 1

It lists the metals in order of their reactivity towards other substances.

Question 2

Using the ‘Reactivity Series, how is metals reactivity determined?

Answer 2

their reactivity is determined by how easily they lose electrons - forming positive ions. (The higher up the reactivity series a metal is, the more easily they form positive ions)

Question 3

List the VERY REACTIVIE metals that are on the Reactivity Series?

(make sure you learn the list for the exam)

Answer 3

Very Reactive are:

Potassium K
Sodium Na
Lithium Li
Calcium Ca

Question 4

List from the Reactivity series, FAIRLY REACTIVE METALS?

Learn the list for the exam

Answer 4

Magnesium Mg
Carbon C
Zinc Zn
Iron Fe

Carbon are non-metals but are often included in the reactivity series

Question 5

List from the Reactivity series, NOT VERY REACTIVE METALS?

Learn the list for the exam.

Answer 5

Hydrogen H
Copper Cu

again, hydrogen and copper are non-metals but are often listed in the reactivty series

Question 6

How metals react with acids tells you what?

Answer 6

about their reactivity

Question 7

Some metals react with acids to produce what?

Answer 7

Salt and hydrogen gas.

Acid + Metal &raquo_space;> Salt + hydrogen

Question 8

How is the speed of reaction indicated?

Answer 8

by the rate at which the bubbles of hydrogen are given off

Question 9

The more reactive a metal, the faster or slower a reaction will go?

Answer 9

faster.

Question 10

Very reactive metals, like potassium, sodium, lithium and calcium, how do they react with water or acids?

Answer 10

explosively (very fast)

Question 11

How do less reactive metals, such as magnesium, zinc and iron react?

Answer 11

they react less violently.

Question 12

Will copper react or unreact with cold, dilute acids?

Answer 12

in general copper wont react

Question 13

How do Magnesium react with cold dilute acids, such as HCl(aq) or H2SO4(aq)?

Answer 13

Magnesium reacts VIGOROUSLY and produces loads of bubbles

Mg(s) + 2HCl(aq) &raquo_space;» MgCl2(aq + H2(g)
Mg(s) + H2SO4(aq) &raquo_space;» MgSO4(aq) + H2(g)

Question 14

How do Zinc and Iron react with dilute acids?

Answer 14

They react slowly with dilute acids, but more strongly if you heat them up.

ZINC
Zn(s) + 2HCl(aq) &raquo_space;> ZnCl2(aq) + H2(g)
Zn(s) + HSO4(aq) &raquo_space;> ZnSO4(aq) + H2(g)

IRON
Fe(s) + 2HCl(aq)&raquo_space;> FeCl2(aq) + H2(g)
Fe(s) + H2SO4(aq&raquo_space;> FeSO4(aq) + H2(g)

Question 15

HCl reacts to form what?

Answer 15

Chloride salts

Question 16

H2SO4 reacts to form what?

Answer 16

Sulfate salts

Question 17

How else can you investigate the reactivity of metals of a reaction?

Answer 17

by measuring the temperature change of the reaction

With an acid or water over a set time period. Ig you use the same mass and surface area of metal each time, then the more reactive the metal the greater the temperature change should be.

Question 18

Metals also react with what?

Answer 18

Water.

The reactions of metals with water also show the reactivity of metals

Metal + Water &raquo_space;> Metal Hydroxide + Hydrogen

eg: Ca(s) + 2H2O(l) &raquo_space;>Ca(OH)2(aq) + H2(g)

More reactions of group 1 metals with water can be found on page 108

Question 19

What other metals will react with water?

Answer 19

Potassium
Sodium
Lithium
Calcium

All react with water

Question 20

What Metals WONT react with water?

Answer 20

Less reactive metals like

Zinc
Iron
Copper

wont react with water

Question 21

Give a balanced equation, including state symbols, for the reaction of sodium and water?

Answer 21

2Na(s) + 2H2O(l) &raquo_space;> 2NaOH(aq) + H2(g)