Predict the pH of a sample of water if Kw were 10−10 or 10−20.

Q: How much of the enzyme proteinase k (solute) is required to make 250ml of a solution with a…

A: A protease (also called a peptidase or proteinase) is an enzyme that catalyzes proteolysis.…

Q: What are the properties of water? Select all that apply. high boiling point low solid density…

A: Water(H2O)is an essential chemical substance. It is a colorless, tasteless, odorless, and nearly…

Q: Calculate the molarity (M) of a 46% (w/v) copper sulfate solution (m.w. = 160.0 g/mol)

A: Molarity is the number of moles of solute per litre of solution.

Q: What determines a molecule’s solubility or lack of solubility inwater?

A: Solubility is defined as the property of different substances ( including, solid, liquid, gas) known…

Q: calculate the pH of a 0.10M solution of formic acid. the Ka of formic acid is 1.8x10^-4

A:

Q: Calculate pNF concentration in each cuvette using Beer-Lambert’s Law.  ε = 18,000 M-1 cm-1; b =…

A: Spectroscopy is the interaction between electromagnetic radiation and matter. If transmittance T…

Q: Provided Stock solution of Coomassie Blue: 0.500 mg/mL Volume of 0.500 mg/ml Solution Dilution to ID…

A: For calculating volume and concentration,  we should follow the formula V1S1 = V2S2where, V1 =…

Q: What is the approximate pH of a solution labeled 6 x 10-5 M HBr? * 4.2 O 4.5 5.8 O 9.8 O 8.2

A: pH is the measure of the strength of H+ ion or Hydronium ions in solution. pOH is…

Q: You have 150 g of dextrose available and you need to compound a 20% solution. If you use the entire…

A: When we describe a concentration as a percentage without specifying the type of formula, we imply…

Q: Explain the difference between a solution with a pH of 5 and a solution with a pH of 3.

A: pH is a scale used to indicate the acidity or basicity of a fluid arrangement. Acidic arrangements…

Q: Using a pH meter, you find the pH of an unknown  solution to be 8.0 how would u describe this…

A: The solution is a mixture of two substances in which one substance dissolves the other substance.…

Q: 3 mL of a 45 mM stock solution of a substrate is added to 8 mL of water. Calculate the following…

A: Calculations for a substrate solution's dilution are related to the subject addressed above. A…

Q: Why do we want to know the pH?

A: pH is defined as the quantitative measure of the acidity or basicity of aqueous or other liquid…

Q: Describe how you would prepare a 500 ml of 0.35M Glycine pH2.2 from a 5M Glycine solution of pH 7.…

A: Ans- Given Molarity = 5M            Desired Molarity= 0.35 M            Desired Volume (V2) = 500ml…

Q: If an unknown solution of cobalt (II) chloride has an absorbance of 0.79, what is its concentration?…

A: The Beer’s Law plot is a graphical representation of the relationship between the absorbance and the…

Q: Complete the table:   Solute Mass of solute Moles of solute Volume of solution Molarity of…

A: Here molar mass of MgSOu = 120.36 g/mol NaOH = 40 g/mol Ch3 oh = 32 g/mol

Q: Write out a recipe to create the following solution: 5ml of 300mM Sodium Citrate (molecular weight -…

A: Molarity It can be calculated using the formula: M=n/V(L) n=w/mol.wt. M =w/mol.wt. × v We have to…

Q: Assume that you have a stock solution of 10% SDS and you need to make 150 microliters of 0.5% SDS.…

A: Stock solution (SDS) = 10%Concentration of stock solution = 10g of SDS/ 100ml of water.Similarly,…

Q: Calculate the [OH] and the pH of a solution with an [H] = 5.6 x 10-10 M at 25 °C. [OH] = pH =…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…