Question

Calculate the osmotic pressures of BSA 1g in 1L water and CH3COONa (10% ionization) 1g in 1 L water using Vant Hoff’s formula

Answer #1

1) Consider two solutions, one formed by adding 10 g of glucose
to 1L of water and the other formed by adding 10g of sucrose to 1L
of water. Calculate the vapor pressure for each solution at 20oZC;
the vapor pressure of pure water at this temperature is 17.5
torr.

Calculate the osmotic pressure of the following solutions:
a) 20 g/L of NaCl in water at temperature 25oC
b) Water at temperature 40oC with calcium carbonate concentration
of 30,000 ppm

particle density: 1.05g/cm^3
particle diameter: 10 micrometer
water density: 1g/cm^3
viscosity of water is 1 centipoise
using a laboratory centrifuge to collect particles in a
water-filled test tube. what is the time for particles to travel
from the top to the bottom of the 10 cm long test tube. The
centrifuge is rotating at 500 rpm and the top of the test tube is
5cm from the axis of rotation. You can assume the terminal velocity
can be reached instantaneously...

The acid ionization constant Ka of benzoic acid (C6H5COOH; HA)
is 6.5 ⨯ 10-5.
(1) Calculate the pH of 2.0L of 0.20 M benzoic acid solution.
(2) After adding 8.0 g of NaOH (molar mass: 40 g/mol) to 2.0 L of a
0.20 M benzoic acid solution,
Calculate the pH.
(3) The solution (2) made above is a buffer solution. 2.0 L of 0.1
M NaOH aqueous solution was added to this solution.
After adding more, calculate the pH of...

A certain weak acid, HA, has a Ka value of
9.5×10−7.
1. Calculate the percent ionization of HA in a 0.10 M
solution
2.Calculate the percent ionization of HA in a 0.010 M
solution.

A certain weak acid, HA, has a Ka value of 3.2×10−7.
1. Calculate the percent ionization of HA in a 0.10 M
solution.
2. Calculate the percent ionization of HA in a 0.010 M
solution.

A certain weak acid, HA, has a Ka value of
3.2×10−7.
1. Calculate the percent ionization of HA in a 0.10 M
solution.
2. Calculate the percent ionization of HA in a 0.010 M
solution.

A certain weak acid, HA, has a Ka value of 1.4×10−7.
1.Calculate the percent ionization of HA in a 0.10 M
solution.
2.Calculate the percent ionization of HA in a 0.010 M
solution.

pH buffer preparation: You have a 1L volumetric flask, 10. M
HCl, solid NaOH, nanopure water, and a container of the weak base
sodium bisulfide (NaSH, pKb = 7.0, – where in water this “salt”
dissociates into Na+ and SH- ions).
a. (6 points) Describe your process for producing a pH buffer
with 0.1M of both the weak acid and its conjugate base. Make sure
to include the exact mass or volume of every single substance you
utilize to create...

if the solubility of ZnCO3 in water at 25 degrees celsius is
1.54*10^-3 g/L, calculate the solubility-product constant of ZnCO3,
assuming complete dissociaition of ZnCO3 that has dissolved.

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