pH, acids, bases, and buffers
What is the pH of blood? 7 7.5-7.6 6.8-7.1 7.35-7.45
7.35-7.45
In the following equation, HCl is the __________? HCl + H2O → Cl- + H3O+ acid conjugate acid base conjugate base
acid
In the following equation, CH3COO- is the ___________________. CH3COOH + H2O → CH3COO- + H3O+ base conjugate base acid conjugate acid
conjugate base
Acids have more ____________ ions and bases have more _______________ ions. hydroxide, hydronium hydroxide, ammonium sulfate, hydroxide hydronium, hydroxide
hydronium, hydroxide
Which of the following is a property of a base? pH can be above or below 7 pH is above 7 pH is equal to 7 pH is below 7
pH is above 7
Which of the following is a property of an acid? pH is below 7 pH is above 7 pH is equal to 7 pH can be above or below 7
pH is below 7
What happens when an acid is added to water? pH will not change pH increases an explosion occurs pH lowers
pH lowers
Each pH unit differs by a power of _________. ten hundred two one
ten
What happens when CO2 is added to water? the pH usually lowers the pH becomes more basic the solution becomes neutral the pH becomes higher
the pH usually lowers
If a solution has a lower pH than another solution, which of the following is true? the solution with the lower pH has more hydronium, H3O+ ions if they are aqueous solutions they have the same amount of hydronium and hydroxide ions the solution with the lower pH is more basic the solution with the lower pH has more hydroxide ions
the solution with the lower pH has more hydronium, H3O+ ions
Which of the following is the purpose of a buffer? to increase the pH to keep the solution at pH of 7 to keep the solution neutral upon addition of small amounts of acids or bases to keep the pH of a solution constant upon addition of small amounts of acid or base
to keep the pH of a solution constant upon addition of small amounts of acid or base
