Question

For fish to survive in your aquarium, you need to have a saturated solution of oxygen in the water. Suppose your aquarium holds 250L of water. How many grams of oxygen do you need to pump into the tank?

Answer 1

The mass of oxygen needed to be pumped in the aquarium is 10 g

Step-by-step explanation:

Here the value of the degree of solubility of oxygen in water is sought

The solubility of oxygen in fresh water is approximately 1.22 × 10⁻³ mol·dm⁻³ which is equivalent to approximately 40 mg/L

The volume of water the aquarium holds = 250 L

The mass of oxygen required = The solubility of oxygen in water × (The volume of water in the aquarium)

Therefore, the mass of oxygen needed to be pumped in the aquarium = 40 mg/L × 250 L = 10,000 mg

1,000 mg = 1 g

∴ 10,000 mg = 10 g

The mass of oxygen needed to be pumped in the aquarium = 10,000 mg = 10 g.