Domestic use water analysis

Acetic acid is found in     lemons.   apples.   sour milk.   vinegar.

3. A student obtains a liquid sample of green food coloring that is known to contain a mixture of two solid pigments, one blue and one yellow, dissolved in an aqueous solution of ethanol. Which of the following setups is most appropriate for the student to use in order to separate and collect a substantial sample of each of the two pigments? In A. D. bab

Pls help ASAP ON ALL ASKED QUESTIONS PLS PLS

For what anions are most of the compounds usually soluble?

Series 9. Mixtures Brass Sand + CuSO4• 5H2O White wine Series 9. Mixtures (continued) Water and BaSO4 Oil and water Vinegar

To prepare benzil you are heating a solution of benzoin with concentrated nitric acid. Following this, you will add water, cool the mixture, and collect the solid. How will you treat/dispose of the left over liquid from this step? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b с d It must be neutralized with sodium bicarbonate and can then be washed down the drain. It must be neutralized with sodium bicarbonate and then disposed of in the organic waste container. It can be directly washed down the drain with lots of water. It can be directly poured into the organic waste container.

how to I convert 10mg/L (10ppm) of nitrate (NO3-) to molar mass of nitrate? Ç Chapter 10 part 1: concentration units As we have learned throughout this class, water contaminants can be harmful to the human body and the environment. There is an exact amount of how much nitrate can be present in drinking water before it becomes unsafe. The U.S. EPA has a standard of 10 milligrams of nitrate per liter of water (mg/L), which is the same as 10 ppm. Anything at or below 10mg/L is considered to be safe for humans to drink. If we were to consume more than the standard level of nitrate it can cause a lot of health concerns, like weakness, dizziness, and an excessive heart rate. Problem: What is the molar mass of Nitrate at 10ppm? the same problemljust worded differently Nitrate (NO3-) I 1mg/L-1ppm convert 10ppm of (NO3-) into molar mass of (NO3-)

Only number 2. It has parts a , b, c

Dilution means adding water to something so that the ratio of solute to solvent is less than in the original solution. Some people say, “Dilution is the solution to pollution.” Do you think this statement true? Could you ever add enough water so that there would be no drink mix—that the water would be the same as in cup #6, pure water? Do you think you could you ever add enough water to a pollutant to make it disappear completely? Why or why not?

please highlight the correct answer

Sulfuric acid is one of the most widely used inorganic acids. You have a sulfuric acid solution in your lab. Its volume is 20.20 mL, the mass fraction of sulfuric acid in the solution is 20.20%, and the density of the solution is 1.141 g/mL. Calculate the molar concentration of sulfuric acid in this solution! Write down the result, expressed in moles/liter, with three decimal places!

Bromination Add a few drops of bromine to a test tube containing 0.5 mL of hexane.  Cover with a cork and gently shake.  Allow to stand for a few minutes until the bromine has vaporized  Is there an expected color change? Test the gases in the test tube with a piece of blue litmus paper moistened with distilled water and held with tweezers. What is the purpose of testing the gas with blue litmus paper? What is the expected color change of the litmus paper?

1. A class organic compounds containing a six-membered ring with alternating double bonds that results in delocalization of the electrons within the ring.  This class of compounds can have additional groups attached to the ring.   2. A family of organic compounds that can be represented by the general formula R-CHO.  3. A compound with the general formula R-COOH.  It is a weak electrolyte that can lose an H+ ion in water solutions. 4. A hydrocarbon with a general formula of CnH(2n+2).  All carbon-to-carbon bonds would be single bonds.

2 Complete the following chemical equation below. Provide the reagent that will separate cach pair of compounds in a single step. (Note: place your answer of the equation in a paper. Take a photo of your answer and paste it in the answer box) 2+ a Ba and Mg 2+ b. Ca 2+ and Ba 2+

Please help me and answer this.

It was determined that benzoic acid (structure below) is not soluble in water. However, it can be reacted with certain substances to promote its solubility in water. One of these substances is: ОН 6 M HCI O 6 M NaHCO3 6 M acetic acid (CH3CO2H) O 6 M NaCl

Gravimetric analysis is a quantitative method that involves measurement of volume of a solution of known concentration which is used to determine the concentration of the analyte.  True  False   A good example of complete analysis is the determination of %C, %H and %O in an unknown organic sample.  True  False

For those anions that usually form soluble compounds, which cations result in the formation of insoluble compounds? List each cation separately.

_4. Preservatives that are usually found in cured meats, bacon, ham, corned beef and hot dogs. A. Benzoates C. Sorbates В. Nitrates D. Acids 5. A type of additive that stabilizes foods through moisture control. A. Emulsifiers C. Humectants B. Flavor Enhancer D. Antioxidants 6. Additives that are usually powders added to baking mixtures which react chemically to release carbon dioxide. A. Raising Agents B. Thickeners C. Humectants D. Antioxidants

Find the Final volume of buret (mL) and the Concentration of NaOH (M )

Dissolve 50 g of NaCl in 1000 mL water. Now boil this solution carefully that solute is not lost during boiling until its volume is reduced to 500 mL. Transfer 50 mL of this concentrated solution to 250 mL volumetric flask. Add water to fill the flask up to the mark (250 mL). What is the concentration of NaCl solution in the volumetric flask?

In this experiment, you will be running multiple trials, each with a TOTAL volume of 35 mL, but with an increasing the amount of vinegar in that mixture each time. What you think will happen as you go from trial 1 all the way through trial 8? The highest amount of NaHCO3 will react in trial #1. The highest amount of NaHCO3 will react in trial #8. The amount of NaHCO3 will react more and more with each trial until a certain point, at which it doesn't matter how much vinegar is added because all of the NaHCO3 will be used up. The amount of NaHCO3 will react less and less with each trial until a certain point, at which it doesn't matter how much vinegar is added because all of the vinegar will be used up.

1. Explain how distillation works in separating simple mixtures. 2. Differentiate simple distillation and fractional distillation. 3. What is an effective way of preventing irregular ebullition or bumping of the mixture during distillation?

Calculate the concentration in ppm of Cd in a 2.00 mL sample which has been shown to contain 16.4 μg Cd. Assume the sample has a density of 1.00 g/mL.      a. 3.28 × 104   b. 8.20   c. 32.8   d. 8.20 × 10−3   e. 8.20 × 103

After adding 50 mL of NaOH solution, but he sample in the flask still had not turned pink. What error did the student make?

Suppose that the volume of NaOH that is needed to titrate HCl is found to be 20 mL. What are the masses of NaOH and HCl in grams? The concentration of NaOH is 0.20 M and the volume of HCl is 30 mL as stated before. Note: to answer this question, you need to first calculate the concentration of HCl. The calculate the moles of each solution. Then calculate the mass of each solution. Please show all your work to get full credit. Hint: Molarity, M = number of moles/1.0 L of solution. 1.0 L = 1000 mL

A chemist wishes to mix a solution that is12​% acid. She has on hand 8 liters of a 8​% acid solution and wishes to add some16​% acid solution to obtain the desired 12​% acid solution. How much 16​% acid solution should she​ add?     A chemist wishes to mix a solution that is 12​% acid. She has on hand 6 liters of a 4​% acid solution and wishes to add some 16​% acid solution to obtain the desired 12​% acid solution. How much 16​% acid solution should she​ add?

16. Two students were having a disagreement about whether NaNO3 mixed with water results in a physical or chemical change. Student A claims it is a physical change because no new substance is formed and upon evaporation of the water, NaNO3 could be recovered since only intermolecular forces change during dissolution. Student B claims it is a chemical change because the ionic bonds in NaNO3, which are intramolecular, are broken by the water. This forms new ions, Nat and NO5, that affect conductivity. What would your group tell Students A and B?

1) In lab you are given 4 bottles, each containing about 5 grams of a white substance. Near the bottles are four labels indicating each bottle contains a high purity substance. Assume these labels belong to the bottles and that each bottle contains a single substance.   The four bottles contain glucose (C6H12O6), sodium chloride (NaCl), aluminum oxide (Al2O3), and zinc sulfate (ZnSO4).   Using your knowledge of solubility rules and electrolytic behavior, describe tests that you could conduct to determine which label belongs to which bottle. For these tests you may only use DI water, an aqueous solution of barium nitrate, and a conductivity tester to identify the substance in each of the bottles. Give the results you would expect for each test.