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- A sample is known to consists of NaOH, or NaHCO3 or Na2CO3 or possible compatible mixture of these, together with inert matter. With methyl orange, a 1.100 g sample requires 31.4 ml of HCl ( 1.000ml is equivalent to 0.0140 g CaO). With phenolphthalein , the same weight of the sample requires 13.3 ml of the acid. Calculate the percent inert matter in the sample? ( ans. 17.7%)A sample is known to consists of NaOH, or NaHCO3 or Na2CO3 or possible compatible mixture of these, together with inert matter. With methyl orange, a 1.100 g sample requires 31.4 ml of HCl (1.000ml is equivalent to 0.0140 g CaO). With phenolphthalein , the same weight of the sample requires 13.3 ml of the acid. Calculate the percent inert matter in the sampleDuring the precipitation of lead sulfate with sulfuric acid, if bismuthyl sulfate is also formed because of the addition of too much water, describe a method of separating them, then illustrate with a balanced ionic equation
- Heat of Reaction, Mole Fraction 1. A group of students perform a series of experiments mixing HCI with an unknown base of the formula M(OH)n. For each trial the total volume of acid and base was 50.0 mL. The concentration of the acid and base solutions were 0.6000 M. The data is plotted in the graph provided. The density of the aqueous solution is assumed to be 1.00 g/mL and the specific heat of water is 4.18 J/g °C in joules 1600 1400 1200 1000 800 600 400 200 0 0.0000 0.6000 M HCI 0 2000 0.6000 M(OH)x 0 4000 0 6000 Mole Fraction of Acid 0 8000 10000 a) What is the limiting reagent at a mole fraction of 0.6 of acid? b) Write a balanced equation for the reaction of M(OH), with HCI. (You must determine "n") c) For one trial, the students measured a temperature change of + 2.9 °C. Calculate q. d) The students calculated a value of q of 1.5 x 10³ J for one of their trials. For this trial 0.015 mol of HCI and 0.015 mol of M(OH), were used. Calculate heat per mole for this reaction.What weight of the soda ash (impure Na2CO3) should be taken for analysis in order that the number of milliliters of 0.500 N acid used will be equal to one-half of the percentage of Na2CO3 in the sample? Note: Present complete solutions for the following problems.Caculate the volume (mL) of 1.0 M potassium carbonate (K₂CO₃) needed to prepare 5.0g of the COPPER pigment. This is where the balanced chemical equation come in. You should be able to relate the moles of pigment to the moles of K₂CO₃, and from that calculate the volume of 1.0 M K₂CO₃ solution needed. Please report your value as XX.X mL (one deicmal point and no units).
- A mixture contain benzoic acid, salt, powdered silica (white sand) and contaminated with coloring. The aim of the experiment is to recover the pure benzoic acid and salt , make a schematic diagram or sketch on what method is applied to separate each component from the mixture to obtain the desired product.Please provide step by step solution.Group I Cations of 6 M HCI; centrifuge for ~1 minute. Decant the solution and add an additional one or two drops of 6 M HCI; if no additional precipitate forms, the precipitation is complete. If it was incomplete, centrifuge to obtain the additional solid; then decant the liquid, add 1 or 2 drops of 6 M HCI, and repeat the procedure until no precipitate forms. Discard the supernatant into the appropriate waste container or keep for later experiments if your instructor so indicates. Add 1.5 mL of cold deionized or distilled water to the precipitate to wash; agitate, centrifuge, and discard the water to the appropriate waste container. Repeat the wash procedure. The solid contains Pb2*, Ag*, and/or Hg22*. Step 2. Separation of Pb2*. Add 1 mL of boiling water to the solid from step 1. Agitate, centrifuge, and decant the liquid. Repeat the extraction, combining the supernatant. The liquid should contain Pb?* if any is present. Step 3. Testing for Pb2*. Add 2 or 3 drops of 0.2 M K2CRO4…
- The solubility of water in diethyl ether has been reported to be 1.468 % by mass.' Assuming that 23.0 mL of diethyl ether were allowed to become saturated with water before used, and that the 1.2 g magnesium was the limiting reagent, what percentage of the product is expected to be lost due to the water in the solvent if the ether is not anhydrous?Prepare the following solution quantitatively using boiled distilled water 1. 250.0 mL 1.0 M stock HCl solutionNOTE: Use the 3.0 M HCl solution from the pic Prepare the following solution quantitatively using boiled distilled water 1. 250.0 mL 0.0500 M standard HCl solution from 1.0 M HClpls compute how to prepare them148. Addition of 50.00 mL of 2.238 m H2SO4 (solution density = 1.1243 g/mL) to 50.00 mL of 2.238 M BaCl2 gives a white precipitate. (a) What is the mass of the precipitate in grams? (b) If you filter the mixture and add more H2SO4 solution to the filtrate, would you obtain more precipitate? Explain.