In
"Calculate the concentration for each solution that are prepared by the following:
Molarity (M)
2.00 mL of stock diluted to 10.00 mL
4.00 mL of stock diluted to 10.00 mL
6.00 mL of stock diluted to 10.00 mL
8.00 mL of stock diluted to 10.00 mL
The stock solution is .1000M CuSO4 5H2O.
The molarity of the solution is already given. So we don't need to calculate the molecular weight. we can directly calculate it through V1S1= V2S2 solution.
The stock solution is 1000M CuSO4.5H2O.
Step by stepSolved in 2 steps
This is somewhat helpful; however, the stock solution is 0.1M, not 1000M and the final answer should be in M (mol/liter) because we are calculating for concentration?
This is somewhat helpful; however, the stock solution is 0.1M, not 1000M and the final answer should be in M (mol/liter) because we are calculating for concentration?
- 2. Hemoglobin is a protein that carries oxygen in the blood. It absorbs light strongly at a wavelength of 400 nm, which gives blood its red color. A solution of hemoglobin is diluted to 10 times its original volume (1.0 mL hemoglobin + 9.0 mL water). The diluted solution has an absorbance value of 0.354. a) Determine the absorbance value of the original solution. Explain how you arrived at your answer. b) It would be simpler to measure the absorbance of the original solution directly. Explain why it is better to dilute the solution before measuring the absorbance for this sample. 3. Why is it important not to touch the sides of the cuvette with your fingers?arrow_forwardA chemistry student is given 1.00 L of a clear aqueous solution at 17 degrees Celsius. He is told an unknown amount of a certain compound X is dissolved in the solution. The student allows the solution to cool to 17 degrees Celsius. The solution remains clear. He then evaporates all of the water under vacuum. A precipitate remains. The student washes, dries and weighs the precipitate. It weighs 0.12 kg. Using only the information above, can you calculate the solubility of X in water at 17° C? If you said yes, calculate it and be sure your answer has a unit symbol and 2 significant digits.arrow_forwardmL When blood is donated, sodium oxalate solution is used to precipitate Ca2+, which triggers clotting. A 122.0-mL sample of blood contains 9.70 × 10-5 g Ca A technologist treats the sample with 100.0 mL of 0.1550 M Na₂C₂O. Calculate [Ca2+] after the treatment. Be sure your answer has the correct number of significant figures. Note: Reference the Solubility product constants (Ksp) table for additional information. M Ca2+ 5arrow_forward
- 100 90 NANO 80 70 CaCl, Pb{NO)2 60 50 40 KCI NaCl 30 20 KCIO, 10 Ce,(SO)a o 10 20 30 40 50 60 70 80 90 100 Temperature (°C) Using the solubility curves above, how many grams of KCI will dissolve in 50 grams of water at 50 degrees Celsius? O 27 8 9 grams 21 grams 19 grams Solubility (g of salt in 100 g H,O) KNO3 K,CrO,arrow_forwardPart A: A volume of 90.0 mLmL of aqueous potassium hydroxide (KOHKOH) was titrated against a standard solution of sulfuric acid (H2SO4H2SO4). What was the molarity of the KOHKOH solution if 13.7 mLmL of 1.50 MM H2SO4H2SO4 was needed? The equation is 2KOH(aq)+H2SO4(aq)→K2SO4(aq)+2H2O(l) Part B: Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide, H2O2H2O2, can be titrated against a solution of potassium permanganate, KMnO4KMnO4. The following equation represents the reaction: 2KMnO4(aq)+H2O2(aq)+3H2SO4(aq)→3O2(g)+2MnSO4(aq)+K2SO4(aq)+4H2O(l)2KMnO4(aq)+H2O2(aq)+3H2SO4(aq)→3O2(g)+2MnSO4(aq)+K2SO4(aq)+4H2O(l) A certain amount of hydrogen peroxide was dissolved in 100. mLmL of water and then titrated with 1.68 MM KMnO4KMnO4. What mass of H2O2H2O2 was dissolved if the titration required 17.8 mLmL of the KMnO4KMnO4 solution?arrow_forwardA student measures the conductivity of three different aqueous solutions of KNO3 using a connductivity probe. The SI units for conductivity is siements/merter (S/M). They find that the conductivity of solutions #3 is higher than the conductivity of Solutions #1, and that the conductivity of solutions #2 is the highest. What conclusion are you able to make about solutions#3?arrow_forward
- A student begins a titration experiment by filling her first buret with unknown acid to the 1.12 mL level. She fills her second buret with base, NaOH, and records an initial volume of 0.08 mL. At the end of the titration experiment and after the pale pink endpoint is obtained, she records her final volume of acid in the buret as 18.85 mL, and the final volume of base in the second buret as 28.74 mL. In the first blank below, please indicate the volume of acid used in her experiment. In the second blank, please indicate the volume of base used. For both answers, please report your answer WITH the correct number of significant figures or decimal places, and WITHOUT a unit. Question 1 options: ___________ answer #1 ___________answer #2arrow_forwardA biochemist carefully measures the molarity of calcium carbonate in 62. mL of photobacterium cell growth medium to be 67. µM. Unfortunately, a careless graduate student forgets to cover the container of growth medium and a substantial amount of the solvent evaporates. The volume of the cell growth medium falls to 6.0 mL. Calculate the new molarity of calcium carbonate in the photobacterium cell growth medium. Be sure your answer has the correct number of significant digits.arrow_forwardOn their third titration trial, the CHM 111 student used 18.80 mL of 0.205 M NaOH(aq) to neutralize 25.0 mL of HCl(aq). Calculate the molar concentration of the HCl solution to the correct number of significant figures.arrow_forward
- A TUMS tablet was dissolved in 110.00 mL of 0.1022 M HCl and analyzed for CaCO3 according to the procedure described in the lab manual. It took 7.48 mL of 0.1005 M NaOH to reach the endpoint. Calculate the mass of CaCO3 in the TUMS tablet to the correct number of significant figures.arrow_forward7B.arrow_forward2. 1.02 mL of methanol (CH3OH) was added into a 75.0 mL volumetric flask and mixed with water until the final volume was reached. What is the molarity of the solution? The density of methanol is 0.790 g/mL. Show your work.arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY