Water and Chemical Reactions Flashcards Preview

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Flashcards in Water and Chemical Reactions Deck (22):
1

The oxygen side of water has this kind of charge.

Slightly negative

2

Because water has an equal number of protons and electrons, it is described as this.

Neutral

3

The hydrogen side of water is slightly positive because of these.

Protons in the hydrogen nuclei are positive

4

This is the attraction of water molecules to water molecules.

Cohesion

4

In water, the electron cloud swarming mostly around oxygen has this charge.

Negative

5

Cohesion causes this.

Surface Tension

6

In water, this has a greater force of attraction of electrons than the hydrogen nuclei.

The oxygen nucleus, because it has 8 protons attracting the electron cloud while the hydrogen each only have 1 proton attracting electrons.

7

Adhesion is the attraction of water to . . .

molecules OTHER than water.

8

This is what happens to bonds during chemical reactions.

Bonds are broken &/or formed.

9

Reactants get turned into these during chemical reactions.

Products

10

This is what happens to atoms during chemical reactions.

They are rearranged.

11

This is the name for those substances that BEGIN a chemical reaction.

REACTANTS

12

This is the name of the substances that are generated in a chemical reaction.

PRODUCTS

13

This is another name for a chemical change.

Chemical reaction

14

During chemical reactions, energy levels can change but the amount of matter . . .

remains constant.

15

These reactions build products of HIGHER potential energy.

Endothermic

16

Stored energy is called this.

Potential Energy

17

This is the term used to describe the energy needed to start a chemical reaction.

Activation Energy

18

This is energy that is in use.

Kinetic Energy

19

These reactions release more energy than they absorb.

Exothermic reactions

20

This type of reaction ALWAYS requires activation energy.

Endothermic

21

This reactions most often occur spontaneously.

Exothermic