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Explain how your observations in the table above verify that the residue in your crucible after heating is
potassium chloride.
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- A 600.0 mg sample consisting of only CaC2O4and Mg C2O4is heated at 500oC converting the two salts to CaCO3and MgCO3. The sample weighs 465.0 mg. If the sample had been heated at 900oC where the products are CaO and MgO, what would the mixture of oxides weigh? Show the clear and complete solutionWhich of the following salts would you predict to also produce bubbles in a chemical reaction withHCl? K2SO4,KHCO3, KCl, Ca(OH)2 and MgCO3In standardizing a solution of NaOH against 1.431g of KHC8H4O4, the analyst uses 35.50 mL of the alkali and has to run back with 5.12 mL of acid (1mL = 0.0031g Na20) What is the normality of NaOH? Additional instructions: Make it handwritten Include up to 4 decimal places Please include explanations of the process Thank you so much!
- Which are false? - purple solution of KMnO4 in burette may be cleaned using oxalate or peroxide - the burette should be washed with the titrant first before titration - HCl cannot be used in place of H2SO4 - MnO2 solids which may form during storage can be filtered out using a filter paper - KMnO4 solutions should be stored in an amber colored bottle protected by light to prevent oxidation - All are false - All are true30mL 0.9% v/v green food coloring. Transfer 2mL of of food coloring to flask, QS the flask to 100mL with DI water. What is the concentration of the standard?Write the procedure and necessary calculations for the preparation of 250 mL of 100 PPB of Cadmium from Cadmium nitrate.
- What are the respective concentrations (M) of Cu2+ and Cl- afforded by dissolving 0.637mol0.637mol CuCl2 in water and diluting to 289mL?289mL? What are the respective concentrations (M) of Cu2+ and Cl- afforded by dissolving CuCl2 in water and diluting to 0.454 and 0.092 2.20 and 2.20 2.20 and 4.41 0.00220 and 0.00220 0.00220 and 2.20Why is phthalic acid soluble in water and what type of IMFs are involved in the solubility of it in water?In standardizing a solution of NaOH against 1.431g of KHC8H4O4, the analyst uses 35.50 mL of the alkali and has to run back with 5.12 mL of acid ( 1mL ≎0.0031g Na2O) What is the normality of NaOH?
- The solubility of carbonates of alkaline metals in water is B a. CaCO3 < BaCO3 < MgCO3 < BeCO3 b. BaCO3 < CaCO3<MgCO3 < BeCO3 c. BeCO3 <CaCO3 < BaCO3 < MgCO3 d. BeCO3 <CaCO3 < < MgCO3< BaCO318. How many milliosmoles are present in 1 pint of 3 % (w/v) solution of sodium citrate dihydrate (Na3Citrate • 2 H2O)? (MWNa3Citrate = 294.1 g/mol)How to prepare these solutions? 250.0 mL 0.125 M stock Na2S2O3 solution from Na2S2O3·5H2O crystals 250 mL 0.10 M NaOHNOTE: Use the 1.0 M NaOH prepared250.0 mL standard 2500 ppm Cu(II) stock solutiona. Weigh and dissolve appropriate amount of Cu(NO3)2·5H2O crystals in enough distilled water.