Question

What is molarity of resulting solution obtained by mixing 8.5 L of 0.5 m urea solution and 500 ml of 2 m urea solution?

Options

• 0.50 m

• 0.75 m

• 0.80 m

• 0.81 m

Answer 1

0.75 m

Explanation:

Molarity of solution of mixing

M₃ = `(m_1v_1 + m_2v_2)/((v_1 + v_2))`

M₃ = `((0.5  m xx 2.5  L) + (2  m xx 0.5  L))/(2.5  L + 0.5  L)`

= `(2.25  ml)/3.01`

= 0.75 m