3.1 Acids and Alkalis

    Cards (78)

    • What color does litmus paper turn in alkaline conditions?
      Blue
    • Acids have a pH less than 7
    • Acids have a pH less than 7, indicating they are acidic
    • What color does litmus paper turn in alkaline conditions?
      Blue
    • What is the taste of alkalis?
      Bitter
    • What ions do strong alkalis produce in water?
      Hydroxide ions (OH-)
    • What reaction occurs when acids interact with metals?
      Hydrogen gas production
    • What happens to litmus paper when exposed to acids?
      Turns red
    • What is the pH range for acids?
      Less than 7
    • What is the pH range for alkalis?
      Greater than 7
    • Alkalis produce hydrogen gas when reacted with metals.
      False
    • What is considered a neutral pH on the pH scale?
      7
    • Match the indicator with its color in acidic conditions:
      Litmus paper ↔️ Red
      Phenolphthalein ↔️ Colorless
      Universal indicator ↔️ Red/orange
    • Indicators undergo a chemical reaction to change color based on pH.

      True
    • When HCl reacts with NaOH, the products are NaCl and H2O.

      True
    • During neutralization, acidic and alkaline properties are neutralized.

      True
    • Acids have a pH less than 7, while alkalis have a pH greater than 7.
      True
    • Acids are used to lower pH in swimming pools and aquariums.

      True
    • What gas is produced when acids react with metals?
      Hydrogen gas
    • What is the pH of a neutral substance?
      7
    • Strong acids have a high pH and low conductivity.
      False
    • Each whole number on the pH scale represents a tenfold difference in hydrogen ion concentration.
      True
    • Match the pH range with its category:
      0 to < 7 ↔️ Acidic
      7 ↔️ Neutral
      > 7 to 14 ↔️ Alkaline
    • Indicators change color at different pH values.

      True
    • Alkalis have a pH greater than 7.

      True
    • Acids have a bitter taste.
      False
    • Alkalis have a pH greater than 7
    • Acids turn litmus paper red
    • Weak acids and weak alkalis only partially dissociate
    • Alkalis have a pH greater than 7 and a bitter
    • Alkalis have a pH greater than 7
    • Acids have a sour taste
    • Alkalis have a bitter taste
    • Match the type of acid/alkali with its ion concentration:
      Strong acid ↔️ High concentration of H+ ions
      Weak acid ↔️ Low concentration of H+ ions
      Strong alkali ↔️ High concentration of OH- ions
      Weak alkali ↔️ Low concentration of OH- ions
    • Weak acids have a very low pH.
      False
    • Lemon juice, with a pH of 2, is an example of an acidic
    • Litmus paper turns blue in alkaline conditions
    • What two products are formed in a neutralization reaction?
      Salt and water
    • What are the pH values of acids and alkalis in a neutralization reaction?
      Less than 7 and greater than 7
    • A neutralization reaction occurs when an acid and an alkali react to form a salt and water