Answers>Chemistry>A Level>Article

ii) The maximum permitted sulfate concentration in water is 250mg dm^-3, 200cm^3 of aqueous BaCl2 is added to 300cm^3 of water at the maximum permitted sulfate level, and a white precipitate formed. Calculate the minimum conc. (mol dm^3)of the BaCl2

250x10^-3= 0.25g dm^-3sulfate mr x moles = mass0.25 x 3/10 = 0.075 g sulfatemr sulfare = 32 + (4 x 16) = 96moles sulfate = 0.075/96 = 7.8125 x10^-4Per equation above: moles SO₄^2-= moles Ba²⁺ Concentration= Moles/Volume[Ba²⁺] = 7.8125x10^-4/0.2=3.91x10^-3 mol dm^-3

Answered by Josh M. • Chemistry tutor

2615 Views

See similar Chemistry A Level tutors

ii) The maximum permitted sulfate concentration in water is 250mg dm^-3, 200cm^3 of aqueous BaCl2 is added to 300cm^3 of water at the maximum permitted sulfate level, and a white precipitate formed. Calculate the minimum conc. (mol dm^3)of the BaCl2

Related Chemistry A Level answers

Explain why Carbon Dioxide has a linear shape with a bond angle of 180 degrees

When you are given a table of half cells with values for electrode potentials, how do you find the strongest oxidising and reducing agent?

Construct expressions for pH, Kw and Gibbs Free energy

Given the following equilibrium: H2O + H2O <-> H3O+ + OH- and the Kw = 10^-14, determine the concentration of OH- species after the addition of 1 mmol of HCl to 1 L of neutral water.