Calculations of osmolarity/osmotic pressure

More documents

Recommendations

Info

$(Microsoft PowerPoint - ATP angl.ppt [Re\236im kompatibility])$

Diluting solutionsExample: You need to prepare 1 liter of 0.1 M HCl. How manyml of concentrated HCl (12 M) do you need to take ?c 1 . v 1 = c 2 . v 212 x v 1 = 0.1 x 1000v 1 = 100/12 = 8.33 mlWhat is molarity of pure water?Molar concentration: moles ofsubstance per liter of solution1 liter of water weighs 997 g at 25 °CFW of H 2 O: 2+16=18997 g H 2 O is 997/18 = 55.4 molesMolarity of pure water is 55.4 mol/l6
Stoichiometric calculationsTitration calculationsExample: An unknown sample of sulfuric acid H 2 SO 4 was titratedwith the known KOH solution. It was found that 12 mL of theKOH c=0.1 mol/L was needed for just complete neutralisation of10 mL H 2 SO 4 unknown sample.What is concentration of sulfuric acid in the sample?Equation: H 2 SO 4 + 2 KOH → K 2 SO 4 + 2 H 2 OCalculation: H 2 SO 4 KOHc 1 . v 1 = c 2 . v 2c 1 = c 2 . v 2 / v 1c 1 = 0.1 . 12 / 10 = 0.12Including stoichiometry : c(H 2 SO 4 ) = 0.12/2 = 0.06 mol/L7
Page 3 and 4: Example: what is volume of one mole
Page 5: Conversion from % to molarityExampl
Page 9 and 10: Stoichiometric calculationsExample
Page 11 and 12: Osmolarity is important in medicine

Calculations of osmolarity/osmotic pressure

Create successful ePaper yourself

Delete template?

Save as template?