acids, bases and salts basics

Question 1

sodium hydroxide + sulfuric acid —–> ?

Answer 1

sodium sulfate + water

Question 2

Ammonia + hydrochloric acid ——–> ?

Answer 2

ammonium chloride

Question 3

lithium oxide + nitric acid ——>

Answer 3

lithium nitrate + water

Question 4

what type of oxide is magnesium oxide give a reason for your answer

Answer 4

basic oxide, because it reacts with water to form a base and releases hydrogen ions

Question 5

Whats the colour of the litmus paper when dipped in an acid

Answer 5

RED

Question 6

whats the colour of methyl orange when dipped in an acid

Answer 6

RED

Question 7

whats the colour of the universal indicator when dipped in a strong acids

Answer 7

turns red

Question 8

whats the colour of the universal indicator when dipped in a weak acid

Answer 8

yellow

Question 9

metal + acid —->

Answer 9

salt and hydrogen

Question 10

Magnesium + hydrochloric acid —->

Answer 10

magnesium chloride + hydrogen

Question 11

metal oxide/hydroxide + acid ——–>

Answer 11

salt + water

Question 12

Copper(II) oxide + sulfuric acid →

Answer 12

copper sulfate + water

Question 13

metal carbonate + acid —>

Answer 13

salt + water + carbon dioxide

Question 14

Sodium hydroxide + hydrochloric acid →

Answer 14

sodium chloride + water

Question 15

Calcium carbonate + hydrochloric acid →

Answer 15

calcium chloride + water + carbon dioxide

Question 16

What colour does thymolphthalein indicator turn in acidic solutions

Answer 16

colourless

Question 17

What colour does thymolphthalein indicator turn in acidic solutions

Answer 17

colourless

Question 18

Give example of a weak acid and a strong acid

Answer 18

HCL, CH3COOH

Question 19

Whats a basic oxide

Answer 19

an oxide that reacts with an acid to form salt and water

Question 20

whats an acidic oxide

Answer 20

its an oxide when reacts with bases forms salt and water

Question 21

whats an amphoteric oxide

Answer 21

type of oxide that reacts with both acid and a base

Question 22

whats a neutral acid

Answer 22

it doesnt react with acids or bases

Question 23

two example of bases

Answer 23

metal carbonates, metal hydroxides, metal oxides

Question 24

Define the term alkali

Answer 24

An alkali is a soluble base that produces hydrogen ions in water

Question 25

Describe how you can use litmus paper to distinguish between hydrochloric acid and aqueous ammonia

Answer 25

Hydrochloric acid turns blue litmus red Aqueous ammonia turns red litmus blue

Question 26

suggest the PH of a concentrated solution of aqueous sodium hydroxide

Answer 26

14

Question 27

name and give the formula of the ion responsible for alkalinity

Answer 27

OH, hydroxide

Question 28

State the value of a concentrated alkai, distilled water and a solution of a very weak acid

Answer 28

14, 7, 6

Question 29

whats the avogrado constant

Answer 29

6.02 times 10 power 23

Question 30

state the colour of methyl orange in aqueous sodium hydroxide

Answer 30

Yellow