[Part 3]-C5- Chemical changes ⚗️

Question 1

What is the difference between concentration 🆚 strength of acids ?

Hint: the amount

Answer 1

• the concentration of an acid tells us the amount of acid molecules, in a given volume of solution
• ; the strength of an acid determines whether it completely or partially dissociates/ionises in aqueous solutions.

Question 2

What is a spectator ion ?

Hint: dosen’t…

Answer 2

• a spectator ion, is an ion that doesn’t take part in the chemical reaction and is found in solution, both before and after the reaction.

Question 3

• Fill in the gaps: If you dilute a strong acid, the pH ________.

Answer 3

• If you dilute a strong acid, the pH increases.

Question 4

In the periodic table, what are the ion charges

Answer 4

Group 1: +1
Group 2: +2
Group 3: +3

Group 6: -2
Group 7: -1

Question 5

What is the ion charge and formula of ammonium ?

Answer 5

• Charge= +1
• Formula= Nh4+^

Question 6

What is the ion charge and formula of nitrate ?

Answer 6

• Charge = -1
• Formula= NO3-^

Question 7

What is the ion charge and formula of sulphate ?

Answer 7

• Charge= -2
• Formula= SO4^2-

Question 8

What is the ion charge and formula of carbonate ?

Answer 8

• Charge= -2
• Formula= CO3^2-

Question 9

What is the ion charge and formula of hydroxide ?

Answer 9

• Charge= -1
• Formula= OH-