Sulfur dioxide (SO₂) is

• a compound

• an element

• a mixture

When the pressure of the gases is increased

• the rate of reaction decreased

• the rate of reaction stayed the same

• the rate of reaction increased

Phosphoric acid is made by reacting phosphate rock with sulfuric acid.

Only three of the methods shown below will increase the rate of this reaction.

Put a tick next to each of the three methods that will increase the rate of this reaction.

• Use a more concentrated solution of sulfuric acid

• Use larger lumps of phosphate rock

• Cool the mixture of phosphate rock and sulfuric acid

• Grind the phosphate rock into a powder before adding the acid

• Increase the temperature of the sulfuric acid

This symbol indicates that a reaction is ____________

• reversible
• irreversible

Tags

NGSS.HS-PS1-6

When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in

• Chemical Equilibrium
• Chemical Balance
• Stoichiometry
• Chemical Reaction

Tags

NGSS.HS-PS1-6

What is the rate of reaction?

• How fast a reaction is 
• How big a reaction is
• How loud a reaction is
• How much gas a reaction produces

Tags

NGSS.HS-PS1-5

What does collision thoery mean?

• How quickly particles collide
• How much energy colliding particles have

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-3

In an exothermic reaction, heat is ...

• taken in
• given out

Tags

NGSS.HS-PS1-4

In an endothermic reaction, heat is ,,,

• taken in
• given out

Tags

NGSS.HS-PS1-4

Such reactions which continue in both directions are called:

• Irreversible reactions

• Reversible reactions

• Non-reactive reactions

• dynamic reactions

Tags

NGSS.HS-PS1-6