Answer to Question #274391 in Organic Chemistry for Kabibe Alexander

Question

Dilution of B1

Initial burette reading/cm³ - 0.00

Final burette reading/cm³- 30.00

What is the Volume of B1/cm³?

Titration of B2 with A1

Initial burette reading/cm³ - (1)0.00 (2)0.00 (3)0.00

Final burette reading/cm³ - (1)24.00 (2)23.10 (3) 23.65

1. Find the number of moles of Na₂Co₃ in 25cm³ of B2.
2. Calculate the number of moles of Na₂Co₃ in 250cm³ of B2.
3. Calculate the concentration of, in mol dm³, of Na₂Co₃ in B1.
4. Calculate the concentration, in g dm^-3, of Na₂Co₃ in B1.
5. Calculate the percentage by mass of Na₂Co₃ in B1.

Equation:

Na2CO3 [aq] + 2HCl[aq] ------> 2NaCl [aq] + CO2 [g] + H2O [l]

Answer 1

Number of moles of Na2Co3 in 25cm3 of B2=0.891moles