3. Incorrect incored g Learning sify each of the following events based on wheth

Question

3.
Incorrect incored g Learning sify each of the following events based on whether the solubility of the indicated gas will increase, ease, or stay the same. Gas solubility does not chang Gas solubility decreases Gas solubility increases o2 in the blood of a co2 in a can of soda as it The temperature is decrea warms to room temperature. person who is in a chamber. an he pressure of over e partial pressure of a solvent is decreased. anesthetic gas is increased. A Previous 8 Give up view solution 2 check Answer Next HEx

Explanation / Answer

1. Solubility of gases

Gas solubility increases

The partial pressure of an anaesthetic gas is increased

Gas solubility decreases

The temperature is decreased

CO2 in a can of soda as it warms to room temperature

The pressure of a gas over a solvent is decreased

Gas solubility does not change

O2 in the blood of a person who is in a hyperbaric chamber

2. Molarity of solutions

a) 0.4 mol NaOH in 2.55 L solution

= 0.4 mol/2.55 L

= 0.157 M

b) 17.1 g NaCl in 803 ml (0.803 L) solution

molarity = 17.1 g/58.44 g/mol x 0.803 L

              = 0.364 M

3. molarity = moles of solute/volume of solution

moles = grams of solute/molar mass of solute

Thus,

when 6.95 g CuNO3 was dissolved to give 0.640 M solution,

Volume of solution = 6.95 g/125.551 g/mol x 0.640 M

                              = 0.0865 L

                              = 86.50 ml

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