Linghu Lake is one of the key areas of fish farming in Huzhou. In the summer in order to solve the problem of insufficient oxygen in the fish pond, fish masters to the fish pond to sprinkle a main ing

Linghu Lake is one of the key areas of fish farming in Huzhou. In the summer in order to solve the problem of insufficient oxygen in the fish pond, fish masters to the fish pond to sprinkle a main ingredient is over the (1) The oxidative decomposition of organic matter will release energy to meet the needs of life activities.

(2) Calcium hydroxide has alkaline, can purify the fish pond, prevent the pond water becomes acidic, absorb the carbon dioxide exhaled by the fish, etc. (choose one of them can).

(3) Let the volume of oxygen produced be x.

2CaO2+2H2O=2Ca(OH)2+O2↑

144 ?32

990g×50% x÷1.43g/L

144

32

=<

990g×50%

x÷1.43g/L

,

x≈76.9L

Answer:(1) Energy.

(2) Purification of the fish pond, prevention of acidification of the water in the pond, absorption of carbon dioxide exhaled by the fish, etc. (choose one of them).

(3) It can produce 76.9L of oxygen.