Question

4. Which solution is more concentrated? Solution "A" contains 50.0 g of CaCO3 in 250.0 mL solution. Solution"B" contains 6.0 moles of H₂SO4 in 2.0 L of solution.

Answer 1

Step-by-step explanation:

First, we need to calculate the molarity of both solutions. The solution with higher molarity is more concentrated.

Solution A:

First, let's transform 50.0 g of CaCO3 into moles using n = m/MM

MM of CaCO3 = 100 g/mol

n = 50/100

n = 0.5 moles

M = n/V

n = 0.5 moles

V = 250 mL = 0.25 L

M = 0.5/0.25

M = 2 mol/L

Solution B:

M = n/V

M = 6/2

M = 3 mol/L

Solution B has a higher molarity than solution A, which means that solution B is more concentrated.

Answer: Solution B.