Acids Bases and Salts Flashcards
What are indicators?
Indicators are Chemicals which change color in acidic/neutral/alkaline solutions
Examples of Indicators
Blue/Red Litmus and Universal Indicator
Color of Red Litmus Paper in Acidic Solution
Red
Color of Red Litmus Paper in Alkaline Solution
Blue
Color of Red Litmus Paper in Neutral Solution
Red
Color of Blue Litmus Paper in Acidic Solution
Red
Color of Blue Litmus Paper in Alkaline Solution
Blue
Color of Blue Litmus paper in neutral solution
Blue
Explain Universal Indicator
can be used to measure ph as the color can be matched to the PH color chart
Explain PH Meter
PH meter measures ph accurately upto 1 decimal place
What is an Acid?
An acid dissolves in water producing Hydrogen Ion(H+)
What in Alkali
And Alkali dissolves in water producing Hydroxide Ions(OH-)
What’s ionized in water?
Strong Acid/Alkali
What is not ionized in water?
Weak Acid/Alkali
Examples of Strong Acid
Hydrochloric Acid, Sulfuric Acid
Examples of Strong Alkali
Sodium Hydroxide /Potassium Hydroxide
Examples of Weak Acid
Ethanoic Acid
Examples of Weak ALkali
Ammonia
What is a Base?
A base is a metal oxide or metal hydroxide which reacts with an acid producing a salt and water
What is a soluble base?
Alkali is a solube base
Define neutralisation
when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water
What type of reactions are neutralization reactions
Exothermic
Name the 4 types of Acid Reactions
Acid + Alkali—–> Salt + Water
Metal + Acid—-> Salt + Hydrogen
Metal Carbonate + Acid—–> Salt + Water + Carbon Dioxide
Acid + Ammonia —> Ammonium Salt
How to Test for Carbon Dioxide?
Bubble the gas into colorless limewater(calcium hydroxide solution)
it will turn milky if the gas in carbon dioxide
