A chemist makes 960. mL of potassium permanganate (KMNO,) working solution by adding distilled water to 80.0 mL of a 0.472 M stock solution of potassium permanganate in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits. Explanation Check O 2022 McGraw Hil LLC All Rights Reserved Terms of Use Privacy Center Accemtbl 80F Cloudy DELL Priscr Insert Delete FB F9 F10 F11 F12 Esc F3 F4 FS F6 F7 Num Lock %23 $4 Backspace 8.

A chemist makes 960. mL of potassium permanganate (KMNO,) working solution by adding distilled water to 80.0 mL of a 0.472 M stock solution of potassium permanganate in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits. Explanation Check O 2022 McGraw Hil LLC All Rights Reserved Terms of Use Privacy Center Accemtbl 80F Cloudy DELL Priscr Insert Delete FB F9 F10 F11 F12 Esc F3 F4 FS F6 F7 Num Lock %23 $4 Backspace 8.

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter11: Properties Of Solutions

Section: Chapter Questions

Problem 109AE: Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray...

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A student prepares a a1.0mM aqueous solution of 4-chlorobutanoic acid C3H6ClCO2H. Calculate the fraction of 4-chlorobutanoic acid that is in the dissociated form in his solution. Express your answer as a percentage. You will probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits.
A chemist must dilute 21.1mL of 6.81M aqueous calcium bromide CaBr2 solution until the concentration falls to 2.00M. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in milliliters. Round your answer to 3 significant digits.
Consider a 1.000-L stock solution of 9.69 M Na3PO4. A 2.000-mL aliquot is taken from this stock solution and diluted to a final volume of 1.000 L. A 5.000-mL aliquot is then taken from this new solution and further diluted to make a new solution with a final volume of 750.0 mL. Calculate Na+ in the final solution.
A student prepares a 1.2mM aqueous solution of crotonic acid C3H5CO2H. Calculate the fraction of crotonic acid that is in the dissociated form in his solution. Express your answer as a percentage. You will probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits.
Sulfuric acid is one of the most widely used inorganic acids. You have a sulfuric acid solution in your lab. Its volume is 20.20 mL, the mass fraction of sulfuric acid in the solution is 20.20%, and the density of the solution is 1.141 g/mL. Calculate the molar concentration of sulfuric acid in this solution! Write down the result, expressed in moles/liter, with three decimal places!
please see image attached: A chemistry student weighs out 0.146 g of chloroacetic acid into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1400M(molarity) NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits.
An unknown sample containing a mixture of NaCl and Na2CO3 was analyzed to determine the % composition of each compound. In the analysis for Na2CO3 (soda ash), the following data were obtained mass of unknown - 0.4436 g conc. of HCl used - 0.25 N initial volume - 0.5 mL final volume - 20.0 mL (MW soda ash) 106.12) 1.) What method was used to determine the concentration of HCl? 2.) What is the net volume of HCl used in the titration? 3.) What is % Na2CO3 in the given sample? NOTE: Round off your answer to a whole number (2 sig fig)
A blood concentration of 0.065 M ethyl alchohol is sufficient to induce a coma. Blood alcohol content is a measure of alcohol in the blood as a percentage. It is calculated in grams per 100mL of blood, so a BAC os 0.08 means your blood is 0.08% alcohol by volume. a) What is the total mass of alcohol (in grams) that it represents for the same adult male whose total blood volume is 5.6L? b) What percentage does it represent from the coma induced level?
A 1 mL sample of glycogen was calculated to contain 35 µmol (micromole) glucose. To 1 mL of this sample was added 2 mL of 2 M HCL. It was then hydrolysed by boiling the solution for 15 minutes. After boiling the hydrolysate was cooled and made up with H2O to a final volume of exactly 10 mL. The glucose was measured in this solution and found to have a concentration of 570 µg/mL (microgram/milliliter). i) Calculate the mass (mg) of glucose in the 10 mL of hydrolysate. As the 1mL of glycogen sample was made up to a final volume of 10 mL, this mass of glucose was produced by the hydrolysis of the original 1 mL glycogen sample. ii) Calculate the amount (µmol) of glucose produced by the hydrolysis of the glycogen sample. iii) Calculate the purity of the glycogen used in the sample as % Purity = (moles of measured glucose/ moles of calculated glucose in glycogen) *100 iv) state your answer in a complete sentence.
A chemist needs to make 3 standard solutions of 10ppm, 50ppm, and 75ppm to read the chloride concentration of an unknown. Show suitable dilutions of stock solution containing 1000ppm Chloride. (1.648g of sodium chloride per liter)
You are a work study student in our chemistry department. Amy, your supervisor has just asked you to prepare 500ml of 3.00M NaOH solution for tomorrow's undergraduate experiment. The Stock Solutions cabinet is under the Stockroom Explorer. You will find find a 2.50 liter bottle containing 19M NaOH. Please prepare a flask containing 500ml of a 3.00M solution. To ensure proper credit, please write your calculations in the space given below.