Properties of Acids
What is the pH range of acids?
Below 7
What is the pH range of bases?
Above 7
What is produced when an acid reacts with a base?
Salt and water
What is the purpose of an indicator?
To show if a solution is acidic or alkaline
What is the only mammal that can fly?
A bat
What ion makes a solution acidic?
Hydrogen ions (H+)
What is a soluble base called?
An alkali
What gas is produced when acids react with metals?
Hydrogen gas
What colour does litmus turn in acids?
Red
What has keys but can’t open locks?
A piano
What happens when an acid is dissolved in water?
It forms hydrogen ions (H⁺)
What ion is found in alkalis?
Hydroxide ions (OH⁻)
What is the general word equation for acid + metal?
Acid + Metal → Salt + Hydrogen
What colour does methyl orange turn in alkalis?
Yellow
What gets wetter the more it dries?
A towel
Name one general property of acids.
Sour taste OR corrosive
What type of substances are bases usually made from?
Metal oxides or metal hydroxides
What are the products when acids react with metal carbonates?
Salt + carbon dioxide + water
Why are synthetic indicators used in titrations?
They have a sharp colour change at the endpoint
Why can’t you trust atoms?
Because they make up everything 😏
Write the equation for hydrochloric acid in water.
HCl (aq) → H⁺ (aq) + Cl⁻ (aq)
What is the equation for sodium hydroxide in water?
NaOH → Na⁺ + OH⁻
Why do only some metals react with acids?
Only metals above hydrogen in the reactivity series react
Why is litmus not suitable for titrations?
It changes colour gradually, making the endpoint hard to detect
Which football club has won the second most UEFA Champions League titles in history?
AC Milan