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- Suppose you had a sample of a white crystalline solid that was a mixture of calcium carbonate and calcium chloride. Describe how you could treat the sample to isolate one of the solid in the pure state. Which solid would it be.A 45.40% ferric oxide needed 0.7519 gram of an impure sample of iron ore. The analyte then required 38.50 ml of potassium permanganate solution to oxidize the ferrous ions. [As= 74.92, Fe=55.85, Mn=54.94, K=39.10]. What is the Normality of the permanganate solution?Q1) (a) Analyze the effects of contaminants in the gravimetric analysis. (b) A raw sample of NaCl weighing 5.45 g was treated with excess of AgNO3 6.92 g AgCl is obtained. Determine the purity of the NaCl.(c) Discuss the factors which contribute to the formation of precipitate
- You need to prepare a solution of 0.123M CuSO4 by starting with solid CuSO4·5H2O. You would be able to use a lab scale that measures to the thousandths and any size volumetric flasks, and pipets that you would need.A sample of salt water was collected weighing 112.09 grams. After boiling for several minutes until dry, the remaining residue weighed 22.11 grams. What was the mass percent of the salt in this sample of seawater?24 When a piece of sodium metal is added to water, hydrogen is evolved as a gas and a solution of sodium hydroxide is formed. (a) Write a balanced equation for this reaction. (b) What is oxidized in this reaction? What is reduced?
- A 1.00 g sample of a magnesium-aluminum alloy yields 0.107 g H2 when treated with an excess of HCl(aq). What is the percentage by mass of Al in the alloy? [Hint: This is the inverse of Example 4-16. To solve this problem, let m and 1.00 - m be the masses of Al and Mg, respectively, and then use these masses in the setup above to develop an equation that relates m to the total mass of H2 obtained. Then solve for m.]A chemical analysis shows that a sample contains 250.0 micrograms ofUranium in 4.00 x 10 4 grams of water. Convert the measurement to partsper billion (ppb).You grab a soft drink bottle from your refrigerator. The contents are liquid and remain liquid even when shaken. You now remove the cover, and the liquid solidifies. Provide an explanation for this finding.
- A solution of bromine in dichloromethane contains 5.0 % bromine by volume. The density of pure, liquid bromine is 3.12 g mL−1. Using this information, calculate the volume of the bromine solution (in mL) required to react with 0.153 g of m-chloropropiophenoneAndrew dissolved 10.00 grams of an iron ore sample in 5.00 L of acid to produce a stock solution. Josh ran a trial of the analytical procedure on the stock solution, but found the solution was too concentrated to be used. So Josh prepared a 1:250 dilution of the sample solution, and, after running the analytical procedure successfully, found the solution contained 1.62 x 10-5 mol/L Fe2+ (aq). What is the mass of iron in the meteorite sample?State four advantages of using nanomaterials in wastewater treatment