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Flashcards in Chemical reactions Deck (18)
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1
Q

What is an element?

A

A substance containing only 1 type of atom

2
Q

What is a compound?

A

2 or more elements chemically combined

3
Q

What is a reactant?

A

A substance that takes part in a chemical reaction

4
Q

What is a product?

A

A substance produced in a chemical reaction

5
Q

On which side of a chemical equation are reactants found?

A

The Left Hand Side (LHS)

6
Q

On which side of a chemical equation are products found?

A

The Right Hand Side (RHS)

7
Q

What does the “+” sign mean on the LHS of an equation?

A

Reacts with

8
Q

What does the arrow mean in a chemical equation?

A

“To produce”

9
Q

What does the + sign on the RHS of a word equation mean?

A

And

10
Q

What is ALWAYS produced in a chemical reaction?

A

A new substance

11
Q

What are the 5 signs of a chemical reaction?

A
  • Gas given off
  • Colour change
  • Smell
  • Energy change (temperature, light)
  • Solid formed
12
Q

How can we detect energy changes in a reaction?

A

Using a thermometer to detect change in temp

Feeling heat given off by a reaction

Hearing sound energy

Seeing Light energy

13
Q

What is meant by “collision theory”?

A

The idea that particles must collide in order to react

14
Q

What is meant by temperature?

A
15
Q

How does increasing temperature increase reaction rate?

A

The particles are moving faster and collide more often and with more energy.

16
Q

How does increasing concentration increase reaction rate?

A

More particles in given area means that particles will collide more often.

17
Q

How does decreasing particle size of a solid increase reaction rate?

A

Collision take place on the surface and the surface area is increased by decreasing particle size

18
Q
A