Answer:
Part A → 7.82 atm
Part B → The unknown solution had the higher concentration
Part C → 0.83 mol/L
Explanation:
Part A
Osmotic pressure (π) = M . R. T . i
NaCl → Na⁺ + Cl⁻ (i =2)
0.923 g of NaCl must be dissolved in 100 mL of solution.
0.923 g / 58.45 g/m = 0.016 moles
Molarity is mol/L → 0.016 m / 0.1L = 0.16M
π = 0.16M . 0.08206 L.atm/molK . 298K . 2 ⇒ 7.82atm
Part. B
The solvent moves toward the solution of higher concentration (to dilute it) until the two solutions have the same concentration, or until gravity overtakes the osmotic pressure, Π. If the level of the unknown solution drops when it was connected to solution in part A, we can be sure that had a higher concentration.
Part. C
π = M . R . T
20.1 atm = M . 0.08206 L.atm/mol.K . 294K
20.1 atm / (0.08206 L.atm/mol.K . 294K) = 0.83 mol/L
Answer:
nuclear power plant
Explanation:
because it's a nuclear power plant it's supposed to do that
Pka = - log ka
10.36 = - log ka
Ka = .......
Answer:H2SO4
Explanation:calcium forms a precipitate in a sulfide compound of so4