compounds

Question 1

What are the 7 diatomic molecules ?

Answer 1

H2, N2, O2, F2, Cl2, Br2, I2

Question 2

Oxyacids

Answer 2

Contain oxygen atoms and are related to polyatomic ions.

Question 3

Nitrate

Answer 3

Oxyacid name: Nitric acid
Polyatomic ion: NO3 −1
Oxyacid formula: HNO3(ag)

Question 4

Carbonate

Answer 4

Oxyacid name: Carbonic acid
Polyatomic ion: CO3 2
Oxyacid formula: H2CO(ag)

Question 5

Chlorate

Answer 5

Polyatomic ion: CIO3 1-

Question 6

Sulfate

Answer 6

Oxyacid name: Sulfuric acid
Polyatomic ion: SO4 2-
Oxyacid formula: H2SO4(ag)

Question 7

Phosphate

Answer 7

Oxyacid name: Phosphoric acid
Polyatomic ion: PO4 3-
Oxyacid formula: H3PO4(ag)

Question 8

Bicarbonate

Answer 8

Polyatomic ion: HCO3 1-

Question 9

Ammonium

Answer 9

Polyatomic ion: NH4 1+

Question 10

Hydroxide

Answer 10

Polyatomic ion: OH 1-

Question 11

Acetate

Answer 11

Oxyacid name: Acetic acid
Polyatomic ion: HC2H3O2 1-
Oxyacid formula: HC2H3O2(ag)

Question 12

Binary acids

Answer 12

Hydrofluoric acid (HF(ag)), Hydrochloric acid (HCl(ag)), Hydrobromic acid (Hbr(ag)), Hydrosulfuric acid (H2S(ag))

Question 13

Bases

Answer 13

Sodium hydroxide (NaOH(ag)), Ammonium hydroxid (NH4OH(ag)), Magnesium hydroxid (Mg(OH)2(ag)), Aluminum hydroxid (Al(OH)3(ag)), Sodium hydrogen carbonate (NaHCO3(ag))

Question 14

How to count atoms ?

Answer 14

The symbol of an element represent one, if there is a subscript that means that their is more than one (ex, H2O), a subscript on the outside of the element multiples all the elements (ex. 3 H2O)

Question 15

How to balance chemical equations ?

Answer 15

Balance the metals first, then balance non metals, balance oxygen and hydrogen last, then count the atoms

Question 16

Sodium phosphate and calcium chloride react to form calcium phosphate and sodium chloride

Answer 16

2 NA3PO4 + 3 CaCl2 -> Ca3(PO4)2 + 6 NaCl

Question 17

Zinc and lead (II) nitrate react to form zinc nitrate and lead

Answer 17

Zn + Pb(NO3)2 -> Zn (NO3)2 + Pb

Question 18

What are the common properties of acids and bases?

Answer 18

Conduct electricity and change the colour of litmus paper

Question 19

What does pH mean?

Answer 19

Power of hydrogen

Question 20

What do the numbers from 0 to 14 mean in terms of measuring pH ?

Answer 20

0-6.9 = acidic
7 = neutral
7.1-14 = basic

Question 21

How does red and blue litmus paper change when it is dipped in an aqueous acid ? Or an aqueous base?

Answer 21

Blue turns red, red stays red. Blue stays blue, red turns blue.

Question 22

What colour does cabbage juice become when mixed with an aqueous acid? Or an aqueous base?

Answer 22

It turns red. It turns a blueish green.

Question 23

How are acids and bases used in everyday life?

Answer 23

Maintaining a stable internal environment in the human body, baking a cake, or determining whether a lake can support aquatic life.