Group 7

Question 1

NaCl(s) + H2SO4(aq) –> NaHSO4(s) + HCl(g)

Answer 1

Acid Base

Question 2

give the products of the equation
NaCl(s) + H2SO4(aq) –>

Answer 2

NaHSO4 (s) + HCl(g)

Question 3

name the type of reaction
NaF(s) + H2SO4 (aq) –> NaHSO4(S) + HF(g)

Answer 3

acid base

Question 4

state the observation for this reaction
NaCl(s) + H2SO4(aq) –> NaHSO4 + HCl(g)

Answer 4

Steamy Fumes

Question 5

state the observation for this reaction
NaF(s) + H2SO4(aq) –> NaHSO4(s) + HF(g)

Answer 5

Steamy Fumes

Question 6

dive the product of the equation
NaF(s) + H2SO4(aq) –>

Answer 6

NaHSO4(s) + HF

Question 7

give the half equation for the oxidation for bromide ions

Answer 7

2Br- –> Br2 + 2e-

Question 8

what is he sulfur product formed when bromide ions reactant with sulfuric acid in a redox reaction

Answer 8

SO2

Question 9

what is the observed when bromide ions reactant with sulfuric acid in a redox reaction

Answer 9

Acidic gas (SO2)
Brown Fumes (Br2)

Question 10

state the three different sulfur products that can be formed when iodide ions react with sulfuric acid in redox reaction

Answer 10

Sulfur dioxide (SO2)
sulfur (S)
Hydrogen Sulfide (H2S)

Question 11

what is the observed when iodine is formed in a reaction with sulfuric acid

Answer 11

Black solid

Question 12

what is observed when H2S is formed in a reaction with sulfuric acid

Answer 12

Bad egg smell

Question 13

what is observed when Sulphur is formed in a reaction using sulfuric acid

Answer 13

Yellow solid

Question 14

what is observed when SO2 is formed a reaction using sulfuric acid

Answer 14

Acidic gas

Question 15

yellow solid and black solid are formed when which two reactants react

Answer 15

iodide ions (i-) and sulfuric acid (H2SO4)

Question 16

what is observed when the reaction occurs
Ag+(aq) + F-(aq) –> AgF(aq)

Answer 16

colorless solution

Question 17

what is observed when this reaction occurs
Ag+(aq) + Cl-(aq) –> AgCl(aq)

Answer 17

white precipitate

Question 18

what is observed when this reaction occurs
Ag+(aq) + Br-(aq) –> AgBr(aq)

Answer 18

Cream precipitate

Question 19

what is observed when this reaction occurs
Ag+(aq) + l-(aq) –> Agl(aq)

Answer 19

yellow precipitate

Question 20

what is the test for halide ions

Answer 20

acidified silver nitrate (AgNO3)

Question 21

why must a halide solution be acidified before testing with silver nitrate

Answer 21

to remove carbonate ions

Question 22

what is observed when dilute ammonia (NH3) is added to AgCl

Answer 22

white precipitate dissolves

Question 23

what is observed when dilute ammonia (NH3) is added to AgBr

Answer 23

Cream precipitate remains

Question 24

what is observed when concentrated ammonia (NH3) is added to AgBr

Answer 24

Cream precipitate dissolves

Question 25

what is observed when concentrated ammonia (NH3) is added to AgI

Answer 25

yellow precipitate remains

Question 26

why is chlorine added to drinking water

Answer 26

to kill bacteria

Question 27

give the products of the equation Cl2(g) + H2O -->

Answer 27

HCIO(aq) + HCl(aq)

Question 28

give the products of the equation Cl2(g) + 2NaOH(aq) -->

Answer 28

NaClO(aq) + NaCl(aq) + H2O(l)

Question 29

chlorine is toxic why is it not dangerous to add it to drinking water

Answer 29

it is added in very low concentrations

Question 30

what is produces when chlorine is added to water

Answer 30

HClO AND HCl

Question 31

what is produced when chlorine is added to sodium hydroxide (NaOH)

Answer 31

NaClO and NaCl and water

Question 32

state the observation for the reaction: Cl2(aq) + 2NaBr(aq) --> Br2(aq) + 2NaCl(aq)

Answer 32

orange/brown solution (BR2 is formed)

Question 33

state the observation for the reaction: I2(aq) + 2NaCl(aq) -->

Answer 33

no reaction ( brown solution remains)

Question 34

give the products of the reaction: Cl2(aq) + 2NaBr -->

Answer 34

Br2(aq) + 2NaCl(aq)

Question 35

give the products of the reaction: Br2(aq) + 2NaI(aq)-->

Answer 35

I2(aq) + 2NaBr(aq)

Question 36

hive the product of the reaction: Br2(aq) + 2NaCl(aq) -->

Answer 36

Br2(aq) + 2NaCl(aq) no reaction

Question 37

what is a REDOX reaction

Answer 37

A reaction when one reactants is oxidised and another is reduced

Question 38

what is oxidation

Answer 38

loss of electrons

Question 39

what is reduction

Answer 39

gain of electrons