Explain why inorganic compounds such as MgCO,, which are unsta- ble when exposed to heat, can induce an error in the measurement of volatile solids.
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- During the formation of the n-butyl bromide, a washing is carried out with the NaHCO3 solution and 2 phases are formed again. What is the organic phase? JustifyBeer's law why does the procedure for measuring the concentration of a solution photometrically require the use of a "blank"?The distribution coefficient for X between chloroform and water is 9.6. What volume of CHCl3 is required to decrease the concentration of X to 1.0 × 10-4 if 25.0 ml of 0.0500 M X is extracted witha) 25.0 ml portions of CHCl3b) 10.0 ml portions of CHCl3c) 2.0 ml portions of CHCl3
- hree components in a mixture have varying distribution constants between the mobile phase and the stationary phass One of the components has a very low distribution constant, Would this component likely elute first or last and how would you design an experiment or modify the components of the separation to make it perform in the opposite manner?Which of the following statements about fractional distillation are true.? Select all that are True. A)The lower the HETP (height equivalent to a theoretical plate) of the fractionating(packed) column the more efficient it is at separation of components. B)The distillation process involves several concurrent vaporization-condensation cycles. C)Continual change in boiling temperature is observed as the distillation progresses. D)Can ideally separate mixtures with comparable volatilities small BP differences. E)For good separation by distillation the volume of liquid condensing back to the pot should be lower than the volume of liquid distilling off.Solid Na2S is slowly added to a solution of 1.0 x 10-3 M Cr3+ (with no change in volume). At what [S2-] will Cr2S3 start to ppt? For Cr2S3, Ksp = 1.0 x 10-20
- At a certain temperature, the solubility of zinc(I) chromate is (7.6x10^-5) M. What is the Ksp? Report your answer to 2 sig figs. Note: Your answer is assumed to be reduced to the highest power possibleA mixture of 20 mL of isoamyl acetate (MW=130.2 g/mol and density= 0.88 g/mL) and 20 mL of methyl benzoate (MW= 136.2 g/mol and density =1.09 g/mL) is distilled. Calculate the mole percent for each component. Use these mole percents and the figure below to answer the following questions.a. What is the initial boiling point of this mixture?b. What is the composition of the vapor in equilibrium with the liquid? Is this composition the same as the composition of the initial condensate from simple distillation?c. Instead of a simple distillation, you decide to use fractional distillation. Assuming two theoretical plates, what is the composition of the first fraction collected?1 g of organic matter dissolved 20 times more in ether than water is dissolved in 500 cm3 of water. Organic matter will be extras from the aqueous phase using 20 cm3 of ether each time. How many times should the extraction phase be repeated to extraction at least 90% of organic matter massively?
- Why was it necessary to keep the total volume of the reagents after mixing constant in all the kinetic runs (i.e., why was it necessary to add distilled water in inverse proportion to the quantity of Solution 1 that was required)?The best liquid mixtures for separation by simple distillation need to have boiling points that differ by at least ___________ oC. 10 20 30 40Match the following: Freezing point depressionThe effect of supercoolingFreezing point of pure solventRegion where liquid is coolingRegion where liquid is freezing I have attached a picture for this question. I guessed the answers to be B,D,E,F,A but i am not sure if it is correct