Question

0 IlaRè sure it passes the requirement of having 1.3 Molarity. u lnusl take a sample of the solution and identify the Measure a volume of 6.0 mL of sodium carbonate solution. Measure and record the mass of an evaporating dish. Pour the 6.0 mL of sodium carbonate solution into your evaporating dish and put on low at hot plate to drive off all the water. ol evaporating dish to weigh and record Calculate molarity of solution. ata: 1. Volume of sodium carbonate solution 2. Mass of evaporating dish o81 49,375 3. 4. 5. Mass ofevaporating dish and sodium, carbonate Mass of sodium carbonate Calculate molarity showing work: 0 .28 1 3 6.0 mL 6. What is the osmolarity of your solution? Show work LAB 11 PAGE 3
Questions 5 and 6

Answer 1

Molarity is the ratio of number of moles of solute dissolved per litre of the solution or it is the measurement of the moles in the total volume of the solution

$Mole= \frac{Weight in gm of Na2Co3}{molecular weight of Na2Co3 }$

Moles of Na2Co3 = 0.286 gm/ 105.988 g/mol = 0.002698 = 0.0027 mol

Molarity = 0.002698 moles/ 0.006 Litre =0.449 moles per litre

Molarity of Na2CO3 = 0.449 moles per litre