Balancing Equations

Question 1

What are the 4 state symbols?

Answer 1

(s) - solid
(l) - liquid
(g) - gas
(aq) - aqueous

Question 2

What does aqueous (aq) mean?

Answer 2

Dissolved in water

Question 3

What is the only metal that is not a solid at room temperature?

Answer 3

Mercury - it is a liquid

Question 4

Water always has the state symbol _______

Answer 4

(l) - you cannot dissolve water in water

Question 5

State and explain what happens to the mass of the piece of magnesium ribbon when magnesium burns in oxygen.

Answer 5

The mass appears to increase as oxygen, which cannot be weighed, as it is a gas, has been brought in the MgO and can now be weighed as it is now solid.

Question 6

State and explain what happens to the mass reading on the balance during the reaction between calcium carbonate and HCl

Answer 6

The mass reading decreases as carbon dioxide, a gas, which escapes, is produced and cannot be weighed.

Question 7

State and explain what happens to the mass reading on the balance during the reaction between lead nitrate and potassium iodide

Answer 7

The mass remains and appears to remain the same as no gases, which cannot be weighed, have been produced or lost.

Question 8

What is meant by the term ‘conservation of mass’?

Answer 8

Mass can neither be created nor destroyed, it can only be conserved.

Question 9

Use chatGPT to be tested on balancing equations and state symbols

Question 10

Metal + nonmetal =

Answer 10

Metal nonmetal-ide

Question 11

Metal + nonmetal +oxygen =

Answer 11

Metal nonmetal-ate

Question 12

Nonmetal + nonmetal =

Answer 12

Nonmetal (mono/di/tri/tetra-nonmetal)

Question 13

What are the diatomic elements?

Answer 13

Hydrogen
Nitrogen
Oxygen
Fluorine
Chlorine
Bromine
Iodine

Question 14

G1 metal + water =

Answer 14

Metal hydroxide + hydrogen

Question 15

G2 metal + water =

Answer 15

Metal hydroxide + hydrogen

Question 16

Hydrocarbon + oxygen

Answer 16

Carbon dioxide + water

Question 17

Halogen + metal =

Answer 17

Metal hallide

Question 18

Acid + base =

Answer 18

Salt + water

Question 19

Metal carbonate + acid =

Answer 19

Salt + water + CO2

Question 20

Acid + metal =

Answer 20

Salt + hydrogen