Intermediate 1 Unit 1b&c

Reactions & Bonding

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What is always formed during a chemical reaction?

A new substance

Give an example of a sign that a

chemical reaction is taking place.

Colour change, bubbling and fizzing, a solid forming,

an energy change

What is precipitation?

A solid being formed when two solutions

react together.

Give an example of an everyday chemical reaction.

Rusting, petrol burning, frying an egg.

How does increasing the temperature affect the speed of a reaction?

It speeds it up

Do larger or smaller particles speed up a reaction?

Smaller particles?

What effect does decreasing the concentration have on the speed

of a reaction?

It slows it down

What is a catalyst?

A substance which speeds up a chemical

reaction

What mass of a catalyst would be left at the end of a reaction if 1g was

used.

The same - 1g

What is an enzyme?

A catalyst which works on living things - a biological

catalyst

Carbon dioxide and water are produced when methane burns in oxygen.

Write a word equation for this reaction.

Methane + oxygen carbon dioxide + water

Water and sodium chloride are formed when hydrochloric acid reacts with

sodium hydroxide.Write a word equation for the reaction.

Hydrochloric acid + sodium sodium + water

hydroxide chloride

What is an element made up of?

Atoms

What is the number given to each element called?

Atomic number

Are the bonds which hold the atoms together in a molecule

strong or weak?

Strong

What is an element?

A substance made up of

identical atoms.

What is a molecule?

A group of atoms joined together.

Are the bonds between molecules strong or weak?

Weak

Is the bond indicated strong or weak?

Strong

bond

Is the bond indicated strong or weak?

Weak

bond

What charge can an ion have?

Positive(+) or negative (-)

What are these type of particles called?

Ions

+ - + -+ - + -

Are the bonds between ions strong or weak?

Strong

Write the formula for the following molecule.

C3H8O

C C C O H

H H H

H

H H H

Write the formula for sulphur trioxide.

SO3

Write the formula for carbon monoxide.

CO

Write the formula for nitrogen dioxide

NO2

Intermediate 1 Unit 1b&c

1 2 3 4 5 6 7

8 9 10 11 12 13 14

15

22 23 24 25 26 27

16 17 18 19 20 21