Q4. A polluted water sample contains approximately 0.1 ppm of chromium, [M=52 g mol-1]. The determination for Cr(VI) based upon absorption by its diphenylcarbazide complex Amax= 540nm E= 41 700 Lmol-1 cm-1_was selected for measuring the presence of the metal. What optimum path length of cell would be required for a recorded absorbance of the order of 0.4?

Q: Which microscopic representation best represents a solution?

A: A homogeneous mixture in which two or more substances are mixed is termed as a solution. We have…

Q: What is reverse osmosis desalination Chemical dosing

A: Interpretation -  To tell about the reverse osmosis desalination Chemical dosing in step by step .…

Q: Question 1 A concentration gradient consists of a gap junction ground substance a solute-level…

A: In this question, we have to choose the correct option regarding concentration gradient

Q: You need to prepare a 4m consentrated solution for a lab and only need 500mL of total solution. If…

A: Given : Concentration of NaCl i.e sodium chloride solution = 4 M And volume of final solution = 500…

Q: Hypotonic solutions cause red blood cells to shrivel, a process known as crenation.   True or…

A: Crenation of red cells is a condition when the red cells of a human body becomes shrivel when the…

Q: How many mL of 15.1 micromolar stock solution are needed to make 50.0 mL of 4.53 micromolar…

A: Dilution :-  If a stock solution of molarity M1 and volume V1 is diluted by adding water to a…

Q: Does removing water from the hydrate constitute a physical or chemical change? Explain

A: A physical change is a change that affects the physical properties of a substance, but not its…

Q: Determine the volume of solution that contains 15.0g of AgNO3 if the solution is 0.375M a. 247mL b.…

A:

Q: How many mL of 15.1 micromolar stock solution are needed to make 50.0 mL of 1.51 micromolar…

A:

Q: 300. mL of beer contains about 15 mL of alcohol. Calculate the % of alcohol by volume. * O 15% O 5%…

A: As per the guidelines, I am Giving answer for the first question. Post other question separately.…

Q: QUESTION 3 A student makes a solution by dissolving 25.4 g of NaOH into 450 g of water. What is the…

A: Given, Mass of NaOH = 25.4 g Mass of water = 450 g

Q: What volume of 2.5 mil/L stock solution is needed to make 300ml of 0.80mol/L solution?

A: We will calculate volume of stock solution using molarity equation.

Q: A chemist drops 10 grams of granular table sugar into a beaker of water at the same time he drops 10…

A: Dissolution process increases with the increase in the surface area.

Q: what the concentration of NaCl in the original solution?

A: Given :- mass of NaCl = 0.505 g              Initial volume of solution = 75.0 mL   To calculate :-…

Q: To what volume should you dilute 124 mL of an 8.05 M CuCla solution so that 49.0 mL of the diluted…

A:

Q: How is a concentrated solution different from a dilute solution?

A: A concentrated solution has higher amount of solute present in the solvent than that of a dilute…

Q: After the complete evaporation of water in a saltwater, there are 0.505 g of NaCl left in the…

A: In this question, we will calculate the Molarity ( Concentration ) of NaCl in original Solution.…

Q: Calculations Mass to make 7 ml of a 0.6 M solution ■ Mass to make 7 ml of a 0.6% w./v. solution

A: Given: 7 mL of 0.6M solution 7 mL of 0.6% w/v solution Assuming Molar mass of solute be m.

Q: A prescription calls for 120 mL of 10% codeine solution. Your stock solution of codeine is 50%…

A: Given: Volume of final solution = 120 mL Concentration of final solution = 10 % And concentration of…

Q: The formula we use to calculate the change in freezing point of a liquid with a solute is shown…

A: The answer for this problem is provided below in great details within the attached figures.

Q: How is a supersaturated solution typically made?

A: Super saturated solution is defined as a solution that contains solute more than the amount present…

Q: A series of dye solutions are made by adding water to the stock Blue I dye solution. Either the…

A: Therefore, the correct arrangement from highest to lowest concentration is as follows-9.0 mL of Dye…

Q: 28. why liquids like mineral oil or acetone are not good at dissolving salts, or why mineral oil and…

A: We need to explain that why acetone or mineral oil do not dissolve salts properly while water does.

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.