8. Acid and Bases (Oxides)

Question 1

what is the definition of acids?

Answer 1

A substance that produces H+ ions in aqueous solutions

Question 2

3 properties of acid

Answer 2

1. sour taste
2. acid dissolve in water can conduct electricity
3. turns blue litmus to red

Question 3

the 3 reaction acids can only form

Answer 3

1. acid + reactive metals= hydrogen and salt
2. acid + base=
   salt and water
3. acid + carbonate=
   salt and water and carbon dioxide

Question 4

definition of base?

Answer 4

any metal oxides or hydroxide to react with acid to produce salt and water only

Question 5

definition of alkalis?

Answer 5

1. are bases that soluble in water
2. substance that produces OH- ions

Question 6

4 properties of alkalis

Answer 6

1. bitter
2. slippery/soapy
3. can conduct electric current due to presence of mobile charge carriers like ions.
4. turn red litmus to blue

Question 7

2 reaction alkalis can do

Answer 7

1.acid + alkalis (neutralisation) =salt and water
2. alkali +ammonium salt=
salt and water and ammonia gas

Question 8

what range of pH level has the highest concentration of OH- ions?

Answer 8

pH>7

Question 9

what range of pH level has the highest concentration of H+ ions?

Answer 9

pH<7

Question 10

what is the color for pH level 3 for universal indicator?

Answer 10

orange/pale yellow

Question 11

what are the 4 oxides?

Answer 11

Basic, Amphoteric, Acidic, and neutral

Question 12

which 2 oxide is a metal oxide?

Answer 12

Basic and Amphoteric

Question 13

what are the 3 special elements in the amphoteric oxide zone?

Answer 13

Zinc, Aluminium,Lead