To obtain cuprum (||) oxide with a mass of 2.4, copper with a mass of 1.92 was heated in acids, write down

To obtain cuprum (||) oxide with a mass of 2.4, copper with a mass of 1.92 was heated in acids, write down the reaction levels and determine the type of reaction and the mass of heated oxygen.

Copper reacts with oxygen to form oxide. The reaction is described by the following chemical reaction equation:

Cu + ½ O2 = CuO ↑;

Let’s find the chemical amount of copper. For this purpose, we divide the weight of the available substance by the weight of 1 mole.

M Cu = 64 grams / mol;

N Cu = 1.92 / 64 = 0.03 mol;

To oxidize such an amount of copper, it is necessary to take 2 times less oxygen.

Let’s calculate the weight and volume of oxygen.

To find the weight, we multiply the amount of the substance by the weight of 1 mole of the substance.

M O2 = 16 x 2 = 32 grams / mol;

m O2 = 0.03 / 2 x 32 = 0.48 grams;

To find the volume of oxygen, we multiply the amount of the substance by the volume of 1 mole of gas (which is 22.4 liters).

m O2 = 0.03 / 2 x 22.4 = 0.336 liters;