Another conceptually simple approach to water purification, but it isn’t quite as straightforward as you might think. The basic concept is that by forcing the water through small spaces, contaminants that can’t fit through are left behind. What is it?

Q: Graphically find the concentration in ppm and then calculate in mol/L of Soda #1 and Soda #2?

A: Caffeine Std (ppm) Absorbance (270 nm) 1 0.179 2 0.39 3 0.673 4 0.787     Soda #1 0.233…

Q: the percentage by mass of water in a sample of dog food

A: In this we have to explain the percentage by mass of water in a sample of dog food  and draw a flow…

Q: How much solid sodium chloride do you need to make 300.0 mL of a 150. mM NaCl solution in water?

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Q: THE ACCEPTABLE LEVEL OF COPPER THAT CAN BE FOUND IN DRINKING WATER IS NO MORE THAN 1.3 ppm. A SAMPLE…

A: Given : Safe concentration of copper in drinking water < 1.3 ppm. Mass of water sample = 5000 Kg…

Q: A student wants 51.0 mL of a 1.50% saltwater solution. They only have a 5.00% stock solution. How…

A: The student require 51.0 ml of solution with concentration 1.5%. The concentration of stock is 5%…

Q: A solution contains 6.9 x 10-6 g of  Br- per kilogram of solution.  What is this in ppb?  Answer to…

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Q: You make a solution using a solid solute (total volume 100mL). The molar mass of the solute is 110…

A: To calculate the molarity of the solution, we need to know how many moles of the solute are…

Q: A person preparing a fish tank uses pre-boiled (and then cooled) water to fill it. When the fish is…

A: The solubility of gaseous solutes decreases with an increase in temperature. This is because, at…

Q: A student peeled the skins from grapes, exposing cells with membranes that are only permeable to…

A: A solution that contains higher solute concentration is termed hypertonic. When a system or a cell…

Q: A 5.04 g sample of a solid containing Ni is dissolved in 20.0 mL water. A 5.00 mL aliquot of this…

A: concentration of Ni in 20mL = 5.53ppm x dilution factor…

Q: You measure your drug concentration in solution at ten minutes and an hour. You get 2 mg/ml at ten…

A: Given,  drug concentration at 10 mins is 2 mg/ml  And at 60 mins is 12 mg/ml

Q: In the lab, you are tasked with creating 500mL of 0.500M HCl solution (hydrochloric acid). In the…

A: We have to make 500mL of 0.500M HCl solution (hydrochloric acid) from 6M HCl

Q: he Don Juan Pond in Antarctica has one of the highest salt concentrations of any natural body of…

A: Density of an aqueous solution is the function of its concentration. Density of the water increases…

Q: Calculate the amount of water that must be added to each of the following substances to produce the…

A: The question is based on the concept of solutions. A solution is made by adding solute and solvent.…

Q: solution. Which of these is true of all solutions?     They all include water. They all include…

A: A solution is formed when we add food coloring to water. We have to select most appropriate option…

Q: A student wants to determine how different factors affect the rate of dissolving a solid in water.…

A: The factors that affect the rate of dissolving solid in water are: Particle size-smaller the size…

Q: 7. Graduated cylinders can be used if an experiment calls for specific volumes but without the level…

A: All graduated glassware can be read with one uncertain digit, i.e. the uncertainty if +/- 0.1 is the…

Q: A sample of seawater contains 1.9 g of calcium ions in 5364 kg of solution. What is the calcium ion…

A: Given  Mass of solute (calcium ions) = 1.9 g Mass of solution = 5364 kg = 5346×103 g Concentration…

Q: Jumbled below are the steps to making a solution. Place the steps in the correct order (step 1 = 1,…

A: During solvation of a solute or dissolution of solute the following steps occurs step by step-…

Q: Consider substances A and B. Substance A is soluble in hot water, but not in cold water. Substance B…

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Q: - * First, a stock solution of 10 mM fluorescein must be made in 15 mL of water. Calculate the mass…

A: Concentration of stock solution = 10 mMVolume of fluorescein solution = 15 ml = 0.015 LMoles of…

Q: The legal limit of blood alcohol limit in most states is 0.080 grams per 100.0 grams of blood. What…

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Q: Part III: Determination of Saturated Solutions Temperature (°C) Molarity (dilute) Molarity…

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Q: Seawater has a concentration of 0.60 M NaCl. The acceptable amount of NaCl in drinking water is…

A: Moles of NaCl in 1L of 0.6M water = Volume × molarity = 0.06 moles.Mass of sodium = Moles × molar…

Q: The maximum safe level of each compound in drinking water is given below. Convert each value to…

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Q: The label for oxacillin 2 g vial states that 11.5 mL of Sterile Water for Injection is needed to…

A: Concentration in mg/mL means 1 mg of solute is present in 1 mL of solution. For a solution of same…

Q: Potassium perchlorate (KCIO4) has a lattice energy of -599 kJ/mol and a heat of hydration of -548…

A: Answer: When a salt is dissolved in water energy is absorbed during the break down of salt into its…

Q: Monique has a pot that contains 7 liters of brine (salt water) at a concentration of 110 g/L. She…

A: The number of moles of solute on per liter of solution is known as concentration.

Q: 63 gallons of a 26% acid solution are mixed with 44 gallons of a 80% acid solution. What is the acid…

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Q: Suppose that your hydrated salt sample was contaminated by an anhydrous salt. You do not realize…

A: The reported percent of water in the hydrated salt will be too low because the second anhydrous salt…

Q: The maximum safe level of a chemical in drinking water is determined to be 52 μg per kg of water.…

A:

Q: might dissolve at different times. Consider: • which day the least sugar dissolve in which day the…

A: When solute dissolves in a solution that process is called dissolution.  Rate of dissolution depends…

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: If you were stranded in an island, you would not drink sea water to quench your thirst because

A: Sea water is more concentrated than our body cells.  And we know when a high concentrated solution…

Q: hat volume of

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Q: A 365 µM solution of a dye molecule, Rhodamine 6G, dissolved in methanol is allowed to sit open to…

A: We know, the concentration term Molarity is defined as

Q: A 50X stock of Bradford reagent would have to be diluted to a 1X working solution prior to use. How…

A: The solution whose concentration is known and used as a standard solution is called a stock…

Q: In New Zealand, the legal blood alcohol limit is 400 ug of alcohol per 1 L of breath. What is this…

A: Ppb is an unit of concentration, where it is denoted as Ppb = (mass of solute in gm / volume of…

Q: Assume that potatoes contain very low concentrations of salt.  In which direction did the sodium…

A: Diffusion is the process in which the ions travel from high concentration to low concentration.

Q: 14. The concentration of the original unknown protein solution is determined to be 0.2173 mg/mL.…

A: Given, Concentration of the protein solution = 0.2173 mg/mL Concentration of the protein solution =…

Q: The maximum level of lead allowed in drinking water is 15mg/kg. What is this concentration in units…

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Q: Which chemical or functional group helps a molecule dissolve in water?  NH2 (amino group) fats…

A: Water is a polar solvent and it can dissolve an ionic or polar covalent compound.

Q: 3. An important conversion factor that you must memorize and use in this course is: 1 mg/L = 8.34…

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Q: Part 1. One gram of caffeine dissolves in 55 ml of water; 7 ml of dichloromethane (DCM); 530 ml of…

A: 1.) To calculate solubility, we would use mass of caffeine and volume of solvent.  2.) To extract…

Q: The EPA's secondary standards for contaminants that may cause cosmetic or aesthetic effects in…

A: The upper limit of chloride according to EPA's secondary standards for contaminants = 250 mg/L…

Q: An enzyme stock solution is 100 µg/µL. The stock solution is serially diluted 4 times by a dilution…

A: Dilution means addition of solvent to a solution in order to decrease its concentration. Dilution…

Q: The maximum safe level of each metal in drinking water is given below. Convert each value to parts…

A: Parts per million: It is the unit that is used to express the small values for quantities of…