PROBLEM 1 A sample of primary standard grade K:Cr:O7 (M.M. = 294.20) weighing 0.2153 g is dissolved, the solution acidified and excess Kl added. The liberated I2 requires 44.86 mL of the NazS:Oa for titration. 1A. Complete the reduction half reaction for Cr2O72-/Cr* (3 pts) Cr2072 (aq). +. H*(aq). +. Cr**(aq). +. H20 1B. Complete the oxidation half reaction for 1M2 (3 pts) (aq). 12(aq). +. .e 1C. What is the stoichiometric mole ratio of the net redox reaction for the reaction between K2Cr207 and 12? (2 pts) mole K2Cr207 =, mole l2

PROBLEM 1 A sample of primary standard grade K:Cr:O7 (M.M. = 294.20) weighing 0.2153 g is dissolved, the solution acidified and excess Kl added. The liberated I2 requires 44.86 mL of the NazS:Oa for titration. 1A. Complete the reduction half reaction for Cr2O72-/Cr* (3 pts) Cr2072 (aq). +. H*(aq). +. Cr**(aq). +. H20 1B. Complete the oxidation half reaction for 1M2 (3 pts) (aq). 12(aq). +. .e 1C. What is the stoichiometric mole ratio of the net redox reaction for the reaction between K2Cr207 and 12? (2 pts) mole K2Cr207 =, mole l2

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Part c
Chemistry Compute 1240.64/12.5. Round the answer appropriately. Express your answer numerically using the proper number of significant figures.
Tab Window Help Learning X ATM HOMEWORK Module 9 X Submit Answer mentid=5735112480241329813180832311&elSBN=9781305862883&id=1707786068&snapshotid=33225... Use the References to access important values if needed for this question. Mind Tap - Cengage Learning X G What volume (in mL) of a 0.125 X ☆ tv References Oxalic acid dihydrate is a solid, diprotic acid that can be used in the laboratory as a primary standard. Its formula is H₂C₂O4 2H₂O. on Using a Primary Standard: This is group attempt 1 of 10 A student dissolves 0.890 grams of H₂C₂04 2H₂O in water and titrates the resulting solution with a solution of sodium hydroxide of unknown concentration. If 35.9 mL of the sodium hydroxide solution are required to neutralize the acid, what is the molarity of the sodium hydroxide solution? Ni ☎ A Autosaved at 10:58 PM Q 9 M A M. *
Need help with homework
Temperature differences on the Rankine scale are identical to differences on the Fahrenheit scale, but absolute zero is given as 0°R. (a) Find a relationship converting the temperatures TF of the Fahrenheit scale to the corresponding temperatures TR of the Rankine scale. TR = (b) Find a second relationship converting temperatures TR of the Rankine scale to the temperatures TK of the Kelvin scale. TK =
GOCSN Login | CSN Essay N. H. Question 2
where does 0.5116 and 1.0074466?
四A:E d. Your answer е. Your answer f. * Your answer
A car traveling at 40.0 m/s applies the brakes and decelerates uniformly at a rate of 2.5 m/s?. a) How far does the car travel in 3.0 s? b) What is its velocity at the end of this time interval? c) How long does it take for the car to come to a stop? d) What distance does the car travel before coming to a stop? (i) How far does the car travel in 3.0 s? m (Please type/enter your answer here) (ii) What is its velocity at the end of this time interval? m/s (Please type/enter your answer here) (ii) How long does it take for the car to come to a stop? (Please type/enter your answer here) (iv) What distance does the car travel before coming to a stop? m (Please type/enter your answer here)
Answerr part b
Why should repetitive measurements always be made, if possible, when performing an experiment. (Please give a detailed answer, thank you)
22.9 mol Hg Express your answer using three significant figures. ΑΣφ N Submit Request Answer Part D 0.280 mol Na Express your answer using three significant figures. ΑΣΦ %3D