What is correct for pure hot water?

What is the pH of 1.0 × 10⁻³ mol dm⁻³ sodium hydroxide, NaOH(aq)?

K_w = 1.0 × 10⁻¹⁴

A.     3

B.     4

C.     10

D.     11

Which solution is basic at 25 °C?

K_w = 1.0 × 10⁻¹⁴

A. [H⁺] = 1.0 × 10⁻³ mol dm⁻³

B. [OH⁻] = 1.0 × 10⁻¹³ mol dm⁻³

C. solution of pH = 4.00

D. [H₃O⁺] = 1.0 × 10⁻¹³ mol dm⁻³

What is the major reason why the pH of unpolluted rain is less than 7?

A. methane

B. carbon dioxide

C. nitrogen oxides

D. sulfur dioxide

Which of these oxides contribute to acid deposition?

I.  ${\mathrm{SO}}_2$
II.  ${\mathrm{NO}}_2$
III.  ${\mathrm{CO}}_2$

A.  I and II only

B.  I and III only

C.  II and III only

D.  I, II and III

Which species is a Lewis acid but not a Brønsted–Lowry acid?

A.  ${\mathrm{Cu}}^{2+}$

B.  ${{\mathrm{NH}}_4}^{+}$

C.  $\mathrm{Cu}$

D.  ${\mathrm{CH}}_3\mathrm{COOH}$

Which species produced by the successive dissociations of phosphoric acid, H₃PO₄, are amphiprotic?

A.     HPO₄²⁻ and PO₄³⁻

B.     H₂PO₄⁻ and HPO₄²⁻

C.     H₂PO₄⁻ and PO₄³⁻

D.     HPO₄²⁻ only

What is the pH of 0.01 mol dm⁻³ KOH (aq)?

A.  1.0

B.  2.0

C.  12.0

D.  13.0

What describes HPO₄²⁻?

A.     Amphiprotic but not amphoteric

B.     Amphoteric but not amphiprotic

C.     Amphiprotic and amphoteric

D.     Neither amphiprotic nor amphoteric

What is the pH of an ammonia solution that has $\left[{\mathrm{OH}}^{-}\right]=1\times {10}^{-4} \mathrm{mol} {\mathrm{dm}}^{-3}$?

A.  $4.0$

B.  $8.0$

C.  $10.0$

D.  $12.0$

What happens to the amount of hydroxide ions and hydroxide ion concentration when water is added to a solution of NH₃(aq)?

Which species acts as a Lewis and Brønsted–Lowry base?

A.      [Al(H₂O)₆]³⁺

B.      BF₃

C.      NH₄⁺

D.      OH⁻

Which is a Lewis acid, but not a Brønsted-Lowry acid?

A.  ${\text{BF}}_3$

B.  ${\text{H}}_{\text{3}}{\text{O}}^{\text{+}}$

C.  ${\text{NH}}_3$

D.  ${\text{Cl}}^{-}$

What is a possible value of pH at the equivalence point in the titration of a strong acid with a weak base?

A.  5

B.  7

C.  9

D.  11

What is the pH of 0.001 mol dm⁻³ NaOH (aq)?

A. 1

B. 3

C. 11

D. 13

What is the pH of a solution in which the hydroxide ion concentration is 1 × 10⁻¹¹ mol dm⁻³ at 298 K?

K_w = 1 × 10⁻¹⁴ at 298 K

A.     3

B.     7

C.     11

D.     14

With which do most acids react?

   I. sodium hydrogen carbonate
   II. magnesium
   III. calcium sulfate

A. I and II only

B. I and III only

C. II and III only

D. I, II and III