SC8a Acids, Alkalis and Indicators

Question 1

acids, alkalis and neutrals pH ranges

Answer 1

acid - 0 to 6
neutral - 7
alkali - 8 to 14

Question 2

litmus colour indicator?

Answer 2

acid - red
alkali - blue

Question 3

methyl orange colour indicator?

Answer 3

acid - red
alkali - yellow

Question 4

Phenolphthalein colour indicator?

Answer 4

acid - colourless
alkali - pink

Question 5

what do acid produce when dissolved in water?

Answer 5

hydrogen ions H+

Question 6

acid - the higher the number of hydrogen ions in a certain volume the higher their…

Answer 6

concentration, the more acidic the solution and the lower the pH

Question 7

what do alkalis produce when dissolved in water?

Answer 7

hydroxide ions OH-

Question 8

alkali - the higher the number of hydroxide ions in a certain volume, the higher their…

Answer 8

concentration, the more alkaline the solution and the higher the pH.​

Question 9

what do neutral solutions contain?

Answer 9

low, equal concentrations of hydrogen ions (H+) and hydroxide ions (OH-).​