Acids and bases

An acid is a substance that produces _____________ when ______________. 

• hydrogen ions, dissolved in oil
• hydrogen ions, dissolved in water
• hydrogen atoms, dissolved in water
• hydrogen atoms, dissolved in oil

Acids have a ___________ taste. 

• bitter
• salty
• sour
• sweet

Acid + metal --> ?

• salt + hydrogen gas
• salt + carbon dioxide gas
• salt + water
• salt + hydrogen gas + water

Acid + base --> ?

• salt + hydrogen gas + water
• salt + carbon dioxide + water
• salt + water
• salt only

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Acid + carbonate --> ?

• salt + water 
• salt + water + carbon dioxide
• salt + carbon dioxide
• salt + hydrogen gas + water

Tags

NGSS.MS-PS1-2

What is the salt formed from the reaction of hydrochloric acid + magnesium metal? 

• Hydrogen magnesium 
• Magnesium chlorine
• Magnesium chloride
• Magnesium hydrogen

Which of the following shows the ionic equation of a neutralisation reaction? 

• H₂O --> H^- + OH^-
• H₂O --> H⁺ + OH^-
• H⁺ + OH^- --> H₂O
• H^- + OH^- --> H₂O

Which of the following is a positive test for hydrogen gas? 

• Splint will continue to burn in presence of hydrogen gas.
• Lighted splint extinguishes with no sound. 
• A white precipitate is formed when the gas is passed through limewater. 
• Lighted splint extinguishes with a 'pop' sound in presence of hydrogen gas. 

What are bases? 

• Bases are salts.
• Bases are metal hydroxides.
• Bases are metal hydroxides soluble in water only. 
• Bases are metal hydroxides and metal oxides. 

Are alkalis bases? 

• Yes
• No