Chemistry

Question 1

What are the types of reactions?

Answer 1

Synthesis- A+B=AB
Decomposition- AB=A+B
Single Displacement-AB+C=AC+B
Double Displacement-AB+CD=AD+BC
Combustion-CxHy+O2=CO2+H20
Neutralization Reaction=Acid+Base=Water+Salt

Question 2

What are the properties of acids

Answer 2

Sour taste, can corrode metal, turns blue litmus paper red

Question 3

What are the properties of bases

Answer 3

Bitter taste, slippery feel, turns red litmus paper blue

Question 4

When using phenolphthalein liquid, what colour do bases turn

Answer 4

Bright pink

Question 5

What are the PH’s of acid

Answer 5

0-6

Question 6

What are the PH’s of bases

Answer 6

8-14

Question 7

What does the law of conservation of mass state

Answer 7

1) mass of products=mass of reactants

2) matter cannot be created or destroyed, only converted into different forms

Question 8

What’s an anion

Answer 8

A non-metal negatively charged ion

Question 9

What’s an cation

Answer 9

A positively charged metal

Question 10

What are molecular compounds

Answer 10

2/2+ anions that share electrons to achieve stability. They physically bond by the electrons bouncing back and forth

Question 11

What are ionic compounds

Answer 11

A compound containing a non-metal and metal ion to create an ionic bond. They do not physically bond and transfer electrons to achieve stability

Question 12

What is this Roman numeral IV

Answer 12

Four

Question 13

Explain the difference between an ion and atom

Answer 13

Ion- charged atom

Atom- smallest unit of matter. The number of protons and electrons are the same

Question 14

What are the five pieces of evidence that a chemical change has occurred

Answer 14

Colour change, precipitate forms, temperature change, odour change, bubbles of gas form