Formulae, equations and Hazards

Question 1

What is the formula for water?

Answer 1

H2O

Question 2

What is the formula for Carbon Dioxide?

Answer 2

CO2

Question 3

What is the formula for Chlorine?

Answer 3

Cl2

Question 4

What is the formula for Ammonia?

Answer 4

NH3

Question 5

What is the formula for Hydrogen?

Answer 5

H2

Question 6

What is the formula for Oxygen?

Answer 6

O2

Question 7

What is the formula for Ammonium ion?

Answer 7

NH4-

Question 8

What is the formula for Hydroxide ion?

Answer 8

OH-

Question 9

What is the formula for Nitrate ion?

Answer 9

NO3

Question 10

What is the formula for Carbonate ion?

Answer 10

CO3^2-

Question 11

What is the formula for sulphate ion?

Answer 11

SO4^2-

Question 12

How do you form an ionic equation?

Answer 12

1. Any aqueous ions will break into their individual ions so write any aqueous ions separately
2. Any aqueous ions that are present on both sides cancel out

Question 13

What does the state symbol (s) mean?

Answer 13

Solid

Question 14

What does the state symbol (l) mean?

Answer 14

Liquid

Question 15

What does the state symbol (g) mean?

Answer 15

Gas

Question 16

What does the state symbol (aq) mean?

Answer 16

Aqueous (dissolved in water)

Question 17

What does this hazard symbol show?https://www.allsigns.co.uk/wp-content/uploads/uploads_img/2016/06/Da71.jpg

Answer 17

Oxidising