b) Write a statement of Lambert's Law. If 2.0 mL of distilled water is added to...
If 2.0 mL of distilled water is added to 3.0 mL of a 0.150 M solution of CoCly, what is the concentration of the resulting solution? Show your work. (a) What is a calibration curve? (b) Why do we use a calibration curve to determine the concentration of our unknown 5. A colored sample with a concentration of 0.160 M has an absorbance of 0.80 in a 1.0 cm path length cuvette. (a) What would be the absorbance expected if...
(a) Write a statement of Beer's Law. (b) Write a statement of Lambert's Law. to9o 4t
Ten grams of an unknown acid was added to 50.0 mL of distilled water. The molarity of the resulting solution was found to be 8.0 M. What is the moral mass of the unknown acid?
A 25 mL sample of a 2.0 M solution of MgCl2 is added to a 500 mL volumetric flask. Water is added to the flask until the total volume is 500 mL. What is the concentration of the resulting solution?
please show work 17) When 200, mL of water are added to 100. mL of 12 % KCl solution the final concentration of KCI is (Assume the volumes add.) A) 12% B) 4.0% C) 36%. D) 6.0% E) 8.0% 18) What is the molarity of a solution containing 5.0 moles of KCI in 2.0 L of solution? A) 2.5 M B) 1.0 M C) 5.0 M C) 10. M E) 2.0 M 19) What is the molarity of a solution...
in the preparation of the standard Beer's law curve, 5.00 mL, 10.00 mL, 15.00 mL and 20.00 mL of a 0.108 M stock solution of glucose were added to separate 50 mL volumetric flasks. Afterwards, each of the flasks was filled to the mark with distilled water and labelled A, B, C and D accordingly. What is the concentration of glucose in the flask C? Report your answer to 3 decimal places.
1,2,3 BEER'S LAW - PRE-LAB QUESTION 1. What mass of solid CoCl2 would you need to prepare 250 mL of 0.150 M solution of CoCl2 from solid CoCl2 and distilled water? Show your calculations. 2. Using the solution from the previous problem and distilled water, how would you prepare 100 mL of a 0.060 M solution of CoCl2? (Hint: use the dilution formula) 3. What is Beer's law? Write an equation and describe all terms used in it.
3. If 200. mL of 0.60 M MgCl2(ag) is added to 40U, ms t tilled water, what is the concentration of Mg2+(ag) and Cl-(aq) in the resulting solution? (Assume volumes are additive.) 15 20 2H [C (mol/L) [Mg] (mol/L) (A (A) 0.20 0.20 0.40 0.20 (C) 0.40 0.40 (D) 2.0 2.5 8 3@00 8. A sample of 25.0 mL of 0.120 M Ca(OH)2(aq) is titrated wit 0.150 M HCl(aq). What volume of HCl(aq) is needed to com pletely neutralize the...
4.07 mL of an aqueous 0.466 M solution and 4.970 mL of water is added to a graduated cylinder. What is the concentration of the resulting solution? Enter your answer with at least 3 sig figs. Don't use scientific notation.
Questions: 1. 495 mg of dried KHP is dissolved in 35 mL of distilled water and titrated with potassium hydroxide (KOH). If it took 22.02 mL of KOH to reach the endpoint, determine the concentration of KOH. Show calculations. If you forgot to dry the above KHP sample and it was later determined to contain 5.00 % water by weight, what would be the actual concentration of the KOH, taking into account the water content? Show calculations. 2. If you...