Unit 1-Chemical Changes And Structures Flashcards Preview

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Flashcards in Unit 1-Chemical Changes And Structures Deck (27)
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1

As the temperature of reaction increases...

The rate of reaction increases

2

The higher the concentration...

The faster the reaction

3

The smaller the particle size…

The faster the reaction

4

What is a catalyst?

Catalyst change the rate of a reaction but are not used up in the reaction

5

What are the three stages of a reaction when catalysts are used

Adsorption, reaction, desorption

6

How do you calculate the average rate of reaction

Average rate= change in mass/change in time

7

What are the three parts of an atom?

Electrons, protons, neutrons

8

What is the relative mass, charge and location of the electron?

Zero, negative one, energy level

9

What is the relative mass, charge and location of protons?

One, positive one, nucleus

10

What is the relative mass, charge and location of the neutron?

One, no charge, nucleus

11

What is an isotope?

Isotopes are atoms of the same atomic number but different mass numbers

12

What is an ion?

An ion is a charge particle and formed when atoms lose or gain electrons

13

What is a molecule?

Molecules are non-metal compounds join together by covalent bonds

14

What is a covalent bond?

A covalent bond is a shared pair of electrons between two non-metal atoms

15

Explain how covalent bonding works?

Atoms are held together because of the electrostatic force of attraction between the positive nuclei of each atom and the negatively charged electrons.

16

What is ionic bonding?

Ionic bonds are the electrostatic forces of attraction between positive and negative ions

17

What are the four things that can change the rate reaction?

temperature, concentration, particle size, use of a catalyst

18

What is the structure of an ionic compound?

And ionic lattice structure

19

Ionic compounds conduct electricity when...

They are in solution or in a melt

20

What is the equation for calculating mass in grams?

M=nxgfm

21

What is equation to work out the concentration of a solution?

C=n/v

22

What is the functional group of an acid?

H+ ion

23

What is the functional group of the alkalis?

OH ion

24

How do you form an acid?

By dissolving a non-metal in water

25

How do you form an alkali?

By dissolving a metal oxide in water

26

What is the product of a neutralisation reaction?

Salt and water

27

What is the product when acids react with metal carbonates?

Salt, water and carbon dioxide