Lab 2

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

Pls help ASAP ON ALL ASKED QUESTIONS PLS PLS

For what anions are most of the compounds usually soluble?

(please type answer fast).

A technician was analysing some waste water from an industrial plant. He collected 500 mL of the water and separated it into two 250 mL samples. He filtered one sample and evaporated the water from the other one. He weighed the dried solid residue from each sample. He found that the mass of solid from the filtered sample was 40 g and the mass from the evaporated sample was 55 g. What mass of soluble and insoluble material was in 1 L of the waste water?

please highlight the correct answer

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

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

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?

Here is a graph of the molarity of acetonitrile (CH, CN) in a reaction vessel during a certain chemical reaction. Use this graph to answer the questions in the table below. у 0.30- 0.25- 0.224 0.20 M 0.15– 0.10- 0.05 50 100 150 200 250 300 seconds

What is the purity test of synthesized aspirin and commercial aspirin?

wum Oxide and Sr(IO3)2•H20 Name: POST-LAB QUESTIONS continued Section a. The solubility of barium iodate monohydrate in 25°C water is 0.028 g per 100. mL of water. Calculate the solubility, or in other words, the proportion of how much product would dissolve if you rinsed it with 125 mL of 25°C distilled water. b. Suppose you have 4.832 g of product and then rinse it with 125 mL of 25°C water, use the answer in 2a to calculate how much product would you expect to isolate. C. The solubility of barium iodate monohydrate in 4°C water is 0.010 g per 100 mL of water. Calculate the solubility, or in other words, how much product would dissolve if you rinsed it with 20.0 mL of 4°C distilled water. d. Suppose you have 4.832 g of product and then rinse it with 20.0 mL of 4°C water, use the answer in 2c to calculate how much product would you expect to isolate. e. Using your answers from (b) and (d), calculate the percent error or percent difference as a result of accidentally using the 25°C…

Can someone pls help thx

Part Two: Types of Solutions (saturated, unsaturated, supersaturated) On a solubility curve, the lines indicate the concentration of a amount of solute that will dissolve at that specific temperature. solution - the maximum Values on the graph could be dissolved at that temperature. (below, above, on) a curve represent unsaturated solutions - more solute Use the solubility curve on the first page to label the following solutions as saturated or unsaturated. If unsaturated, write how much more solute can be dissolved in the solution. Solution If unsaturated: How Saturated (S) or Unsaturated (Un)? much more solute can dissolve in the solution? a solution that contains 70g of NaNO3 at 30°C a solution that contains 50g of NH.Cl at 50°C a solution that contains 20g of KCIO3 at 50°C a solution that contains 70g of KI at 0°C

POSTLABORATORY ASSIGNMENT 1. An oleic acid, C17H33COOH (282 g/mol), solution is added to water in a watchglass until a monolayer forms. Assume that there are no spaces between molecules in the monolayer and that each oleic acid molecule occupies an area of 0.25 nm². If the concentration of the oleic acid solution is 0.00012 g/mL, what is the experimental value of Avogadro's number? dropper pipet calibration number of drops of oleic acid in the monolayer diameter of monolayer OMA 30+20 od os pulgad Im od of ingranit yd souls mesto bonstantial = || || || 00.1 arestusslom (0) N = = = Jorna ode 65 drops/mL 16 drops 14.5 cm dirua orli unalools) mano lo zemoristalls d A(otho) wall

Based on this student data, calculate the average molarity of the NaOH solution. Standard: KHP = potassium hydrogen phthalate, MM 204.4 g/mol Student Data Trial 1 E KHP mL initial: NaOH mL final: NaOH 2.02 0.57 19.25 Trial 2 2.05 19.25 39.80 Trial 3 1.99 1.65 20.75

Please answer Parts 2 and 3

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?