Acids, Alkali And Acids Flashcards
(28 cards)
What is an acid
A substance that releases hydrogen ions (H*) in aqueous solution.
What is a base
A substance that neutralizes acids to form salt and water.
What is an alkali
A base that dissolves in water to release hydroxide ions
(OH*).
What is the pH range of acids?
Less than 7
What is the pH range of alkalis?
Greater than 7
Name 3 examples of acids
Hydrochloric acid (HCl) , sulfuric acid (H2SO4) , nitric acid (HNO3).
Name 3 examples of alkalis
Sodium hydroxide (NaOH), potassium hydroxide (KOH), ammonia (NHs).
What color does blue litmus paper turn in acids
Red
What color does red litmus paper turn in alkalis
Blue
What colour litmus paper do you use for acids
Blue litmus paper
What do alkalis release in water?
Hydroxide ions (OH*)
Write the reaction of sodium hydroxide (NaOH) in water
NaOH → Na* + ОН*
What is the pH of a neutral solution?
7
Name an indicator that shows the full pH range
Universal indicator
What color does methyl orange turn in acids?
Red
What color does phenolphthalein turn in alkalis
Pink
What color does phenolphthalein turn in alkalis
Yellow
What color does methyl orange turn in alkalis
Colourless
What is a neutralization reaction?
The reaction between an acid and a base to form a salt and water.
Write the general equation for acid + base.
Acid + Base → Salt + Water
Write the general equation for acid + metal carbonate
Acid + Metal Carbonate → Salt + Water + Carbon Dioxide
Write the general equation for acid + metal oxide
Acid + Metal Oxide → Salt + Water
What salt is formed when hydrochloric acid reacts with a base
A chloride salt
What salt is formed when sulfuric acid reacts with a base
A sulfate salt
