Question

Calculate the mass of arsenic(III) chloride

produced when 0.150 g of arsenic reacts with

excess chlorine according to the equation:

2As+3Cl2 → 2AsCl3

Answer 1

Mass of arsenic chloride produced is 0.363 g

Step-by-step explanation:

Given data:

Mass of arsenic chloride produced = ?

Mass of arsenic react = 0.150 g

Mass of chlorine = excess

Solution:

Chemical equation:

2As + 3Cl₂ → 2AsCl₃

First of all we will calculate the number of moles of arsenic.

Number of moles = mass/ molar mass

Number of moles = 0.150 g/ 75 g/mol

Number of moles = 0.002 mol

Now we will compare the moles of arsenic with arsenic chloride.

As : AsCl₃

2 : 2

0.002 : 0.002

Mass of arsenic chloride produced:

Mass = number of moles × molar mass

Mass = 0.002 × 181.28 g/mol

Mass = 0.363 g