Chemistry HL – Page 2

M25-CHEM-HL-TZ3-P1A-Q32

Which solution is acidic at \( 25^{\circ}C \)?

Which equation correctly describes a chemical reaction?

Which of these bases has the strongest conjugate acid? Base properties: \( NH_3 \): \( K_b = 1.8 \times 10^{-5}

What is the pH of a buffer solution which contains \( 0.500 \, mol \, dm^{-3} \) of methanoic acid

What is the pH of \( 0.0010 \, mol \, dm^{-3} \, HCl(aq) \)?

Which statement about this equilibrium reaction is correct? \( CH_3CH_2OH(aq) + HCOOH(aq) \rightleftharpoons CH_3CH_2OOCH(aq) + H_2O(l) \)

How many moles of oxygen are needed for the complete combustion of 11.5 g of \( C_3H_8(g) \)? \( M_r

Which apparatus can be used to monitor the progress of this reaction? \( NaHCO_3(aq) + HCl(aq) \rightarrow NaCl(aq) + H_2O(l)

Compounds P and Q were mixed together at various concentrations and the initial rate of each reaction was measured. Exp

What are the units for the rate constant, \( k \), in the following expression? Rate = \( k[X]^2[Y]^0 \)