(NH4)2Cr2O7 (s) --> Cr2O3 (s) + 4 H2O (g) + N2 (g) The compound Ammonium Dichromate, (NH4)2Cr2O7, will decompose into Cr2O3, H2O, and N2, when it is heated vigorously. However, it is almost impossible to acquire a pure sample of (NH4)2Cr2O7 , instead (NH4)2Cr2O7 is usually contaminated with some Cr2O3 in its container. To determine how much Cr2O3 is in the container, a student heats a sample of the mixture, and collects the water vapor using a drying agent. The following table shows the data the student recorded during the heating of a sample of the mixture. Mass of Empty Test Tube 14.66 g Mass of Test Tube and Mixture before Heating 16.92 g Mass of Drying Agent Before Reaction 2.26 g Mass of Drying Agent and Water After Reaction 2.65 g a) Calculate the grams of (NH4)2Cr2O7 present in the mixture in the test tube before the mixture was heated. b) Determine the mass percent of (NH4)2Cr2O7 in the mixture. c) If the student spilled some of the mixture out of the test tube i) before weighing the test tube + mixture and before heating, how would this affect the mass percent of (NH4)2Cr2O7 calculated in part b)? ii) after heating, how would this affect the mass percent of (NH4)2Cr2O7 calculated in part b)?

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

Related questions

Question

(NH₄)₂Cr₂O_{7 (s)}--> Cr₂O_{3 (s)}+ 4 H₂O _(g)+ N₂_(g)

The compound Ammonium Dichromate, (NH₄)₂Cr₂O₇, will decompose into Cr₂O₃, H₂O, and N₂, when it is heated vigorously.

However, it is almost impossible to acquire a pure sample of (NH₄)₂Cr₂O₇, instead (NH₄)₂Cr₂O₇is usually contaminated with some Cr₂O₃in its container.

To determine how much Cr₂O₃ is in the container, a student heats a sample of the mixture, and collects the water vapor using a drying agent. The following table shows the data the student recorded during the heating of a sample of the mixture.

Mass of Empty Test Tube	14.66 g
Mass of Test Tube and Mixture before Heating	16.92 g
Mass of Drying Agent Before Reaction	2.26 g
Mass of Drying Agent and Water After Reaction	2.65 g

a) Calculate the grams of (NH₄)₂Cr₂O₇present in the mixture in the test tube before the mixture was heated.

b) Determine the mass percent of (NH₄)₂Cr₂O₇ in the mixture.

c) If the student spilled some of the mixture out of the test tube

i) before weighing the test tube + mixture and before heating, how would this affect the mass percent of (NH₄)₂Cr₂O₇calculated in part b)?

ii) after heating, how would this affect the mass percent of (NH₄)₂Cr₂O₇calculated in part b)?

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 4 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions