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Determine the pH of the equivalence point for a reaction in which 0.100 mol/L NaOH neutralizes 10.0 mL of 0.250 mol/L HF.
The Ka for methanoic acid, the chemical that causes the sting in insect bites, is 1.8 x 10^-4. Calculate the pH of a 0.40 mol/L methanoic acid solution.
Quinine is a weak base that is used to flavour tonic water and treat malaria. The Kb for quinine is 3.3 x 10^-6. Calculate the pH of a 1.7 x 10^-2 mol/L solution of quinine.
Propanoic acid is a weak acid used to inhibit mould formation in bread. A 0.10 mol/L solution of propanoic acid has a pH of 2.96. Calculate the Ka for the propanoic acid.
The pH of a 0.32 mol/L weak base solution is 9.8. Calculate the Kb of this base.
If a cube of material is subdivided into 1000 smaller cubes of equal size, the surface area of the smaller cubes will be what fraction of the original? How many times greater than the original will the total surface area of the cube be?
The following surface tension were mesaured for the aqueous solutions of the nonionic
surfatant CH3(CH2)9(OCH2CH2)5OH at 25oC.
Determine the critical micelle concentration (cmc) and the area occupied by each surfactant molecule at the critical micelle concentration (cmc).
surfatant CH3(CH2)9(OCH2CH2)5OH at 25oC.
Determine the critical micelle concentration (cmc) and the area occupied by each surfactant molecule at the critical micelle concentration (cmc).
find the concentration of .5M, .4M, .3M, .2M, and .1M of a 5% NaOCl solution
1) If I add 400 grams of NaCl into enough water to make a solution of 25% concentration by mass, what is the total mass of this solution?
2) how much water (in mass) should I add if I want to make 50% (m/m) NaOH solution with 75g of NaOH?
3) if I add 0.75 mg of HCl 20 g of water, what is the concentration of the solution by mass?
4) what is the percent by volume of a solution if 600 mL of acetic aid are added to 2L of water?
5) a substance has a solubility of 350 ppm. How many grams of the substance are present in 2.0 L of this saturated solution?
2) how much water (in mass) should I add if I want to make 50% (m/m) NaOH solution with 75g of NaOH?
3) if I add 0.75 mg of HCl 20 g of water, what is the concentration of the solution by mass?
4) what is the percent by volume of a solution if 600 mL of acetic aid are added to 2L of water?
5) a substance has a solubility of 350 ppm. How many grams of the substance are present in 2.0 L of this saturated solution?
Prove that 1ppm = 1mg/L
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#340153 on Dec 2023
#340153 on Dec 2023