Redox And Acids

Question 1

What is an acid

Answer 1

Acids release H+ ions

Question 2

Base?

Answer 2

A base readily accepts H+ions from acids

Question 3

Standard solution

Answer 3

Is a solution of known concentration

Question 4

Alkali

Answer 4

Release oh- ions in aqueous solution

Question 5

Why are they examples of salt

Answer 5

As the H+ ion has been replaced by the (metal eg calcium) ion

Question 6

How do you ensure all water has been driven off

Answer 6

Heat crucible until it’s mass remains constant

Question 7

Calcium hydroxide is used as what

Answer 7

Used to neutralize acidic soil and excess can make soil too alkaline

Question 8

Reaction of chlorine and sodium hydroxide

Answer 8

Cl2+2NaOH=NaClO+Nacl+H2O

Question 9

How do Caco3 tablets work for indigestion

Answer 9

It neutralizes HCl

CaCO3+2HCl—>CaCl2+H2O+CO2

Question 10

(NH4)2SO4 uses

Answer 10

Acts as a fertilizer and manufactures of explosives

Question 11

NaClO use?

Answer 11

Used as bleach

Question 12

What is chlorine plus water

Answer 12

Cl2+H2O—->HCl+HClO

HCl is acidic so H+ions are released

Question 13

Percentage uncertainty

Answer 13

reading*uncertainty/value measured

Question 14

What is disproportionation

Answer 14

It’s when the same species is oxidized and reduced

Question 15

What is titration

Answer 15

Where a standard solution of know concentration is reacted with a solution of unknown concentration to find its concentration