Copper(ii) sulfide, cus, is used in the development of aniline black dye in textile printing. what is the maximum mass of cus which can be formed when 38.0 ml of 0.500 m cucl2 are mixed with 42.0 ml of 0.600 m (nh4)2s? aqueous ammonium chloride is the other product.

1.82 g   is the maximum mass of CuS.

Explanation:

Considering:

Or,

Given :

For :

Molarity = 0.500 M

Volume = 38.0 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 38.0×10⁻³ L

Thus, moles of :

Moles of  = 0.019 moles

For :

Molarity = 0.600 M

Volume = 42.0 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 42.0×10⁻³ L

Thus, moles of :

Moles of  = 0.0252 moles

According to the given reaction:

1 mole of reacts with 1 mole of

So,  

0.019 mole of reacts with 0.019 mole of

Moles of = 0.019 mole

Available moles of = 0.0252 mole

Limiting reagent is the one which is present in small amount. Thus, is limiting reagent.

The formation of the product is governed by the limiting reagent. So,

1 mole of gives 1 mole of

0.019 mole of gives 0.019 mole of

Moles of formed = 0.019 moles

Molar mass of = 95.611 g/mol

Mass of = Moles × Molar mass = 0.019 × 95.611 g = 1.82 g

1.82 g   is the maximum mass of CuS.