Science, Chem - Acid and Alkalis

Question 1

properties of acids

Answer 1

• corrosive
• taste sour
• contains hydrogen
• pH level : less than 7

eg. sodium hydroxide, nitrate hydroxide, sulfuric hydroxide

Question 2

properties of alkalies

Answer 2

• soapy
• soluble bases
• can burn skin
• tastes bitter
• contains hydroxide ions
• pH level : more than 7

Question 3

neutralization

Answer 3

• when alkali and acid are mixed to cancel out each other
• acid + alkali => salt + water

Question 4

litmus indicator

Answer 4

• litmus paper
• aciD = reD
• alkalinE = bluE

Question 5

universal indicator

Answer 5

• 0 to 14 = acid to alkali
• 0 to 6 = acidic (red / orange)
• 7 = neutral (yellow)
• 8 to 14 = alkali (green/blue/purple)