What is the colour of this ion?

CoCl(H₂O)₅⁺(aq)

One of the reactions which happens in an aqueous solution of carbon dioxide is:

H₂CO₃(aq) ⇄ HCO₃^-(aq) + H⁺(aq)

Which one of the following statements best describes the effect of adding hydroxide (OH^-(aq)) to a solution containing H₂CO₃?

A chemical reaction has reached equilibrium when:

The reactions which happen in an aqueous solution of carbon dioxide include:

CO₂(g) ⇄ CO₂(aq)

CO₂(aq) + H₂O(l) ⇄ H₂CO₃(aq)

H₂CO₃(aq) ⇄ HCO₃^-(aq) + H⁺(aq)

Which one of the following statements best describes the effect of adding hydroxide (OH^-(aq)) on the solubility of CO₂(g) in water?

Consider a series of reactions like this:

A ⇄ B

B ⇄ C

If a mixture of compounds A, B, and C is at equilibrium, and some C is removed, which of the following statements best describes what happens?

The partial pressure of O₂ in the atmosphere at sea level is 21.3 kPa. What is the partial pressure of O₂ on the top of a mountain, where the atmospheric pressure is 65.1 kPa?

[Atmospheric pressure at sea level is 101.3 kPa.]

The partial pressure of O₂ in the atmosphere at sea level is 21.3 kPa. What is the partial pressure of O₂ on the top of a mountain, where the atmospheric pressure is 62.7 kPa?

[Atmospheric pressure at sea level is 101.3 kPa.]

In this experiment you will investigate the solubility of iodine in which solvents? Select all solvents you will use for that part of the experiment, however do not select any other solvents - this will result in a reduced mark. 

Which of the following molecules are polar? Select only the polar molecules, selecting others will result in a reduced mark. 

Which of the following substances has the largest dispersion forces?