Interpretation:
The list of chromium compounds with +3, +4 and +6 oxidation states of chromium should be determined.
Concept introduction:
The
Oxidation state is also known as oxidation number. It is defined as the numbers which are assign to the elements in a chemical combination and number represents the electrons which an atom can share, lose or gain to form
Reduction is the process in which either gain of electrons, oxidation number decreases, or gain of hydrogen atoms takes place. An element is reduced, when oxidation number decreases.
Therefore, transfer of electrons refers to the oxidation state.
Want to see the full answer?
Check out a sample textbook solutionChapter 3 Solutions
GENERAL CHEMISTRY(LL)-W/MASTERINGCHEM.
- Write balanced chemical equations for the following reactions: (a) zinc metal heated in a stream of oxygen gas (b) zinc carbonate heated until loss of mass stops (c) zinc carbonate added to a solution 0f acetic acid, CH3CO2H (d) zinc added to a solution of hydro-bromic acidarrow_forwardConsider the iron alloy described in Question 19. Suppose it is desired to prepare 1.00 kg of this alloy, what mass of each component would be necessary?arrow_forwardA mixture containing FeCl3 and AlCl3 only weighs 750.8 mg. The chlorides were precipitated using ammonia and ignited to Fe2O3 and Al2O3 respectively. The oxide mixture weighs 351.3 mg. Calculate the percentage of aluminum in the samplearrow_forward
- Describe the reaction of aqueous solutions ofsodium sulfide and copper(II) sulfate, producing theprecipitate copper(II) sulfide.arrow_forwardA concentrated aqueous copper (II) chloride solution is bright green in color. When diluted with water, the solution becomes light blue. Explain. You may use chemical equations to emphasize your point.arrow_forwardWhat is efflorescence? Give an example?arrow_forward
- What is the net ionic equation for the reaction of aqueous lead(II) nitrate with aqueous sodium bromide?arrow_forwardA sample of an oxide of vanadium weighing 4.589 g was reduced with hydrogen gas to form water and another oxide of vanadium weighing 3.782 g. The second oxide was reduced further with hydrogen gasuntil only 2.573 g of vanadium metal remained. Calculate the empirical formulas of the two oxides? Write down balanced reaction equations for the two reduction reactions above. Calculate the total mass of water (in grams) that forms during the second reduction reaction.arrow_forwardMany transition metals can undergo a series of reaction similar to those of the copper reactions in this experiment. Identify the type of reaction for each of the chemical equations below involving manganese. Mn(OH)2(s) + heat → MnO(s) + H20(g) Choose... Mn(s) + 2 H2SO4(aq) → MnSO4(aq) + H2(g) Choose... MNSO4(aq) + NaS(aq) → MnS(s) + Na2SO4(aq) Choose.. Mn2+(aq) + H202(aq) + 2 OH¯(aq) MnO2(s)+ 2 H20(1) Choose... MnSO (aq) + 2 NaOH(aq) → Mn(OH)2(s) + Na2SO4(aq) v Choose. metathesis hydrolysis redox dehydration < ВАСК Question 4 of 6 NEXT átv A 80 F3 F2 F4 FS F7 FB F9 F10 FW %23 2$ % & 3 5 6 7 8.arrow_forward
- 1.736 g of iron ore is dissolved with acid and precipitated as Fe2O3X.H2O. After the precipitate is filtered and washed, it is converted to Fe2O3. If the weight of Fe2O3 is 0.248 g, calculate the percentage of Fe in the sample?arrow_forwardwhen hydorgen sulfide gas is bubbled through a solution of lead (II) nitrate, a black precipitate of lead (II) sulfide forms and nitric acid is produced.arrow_forwardComplete and balance the reaction. Include the physical states of the products. Na, CO, (s) + 2HCI(aq)arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningGeneral Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage LearningChemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub Co
- Chemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStaxChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningPrinciples of Modern ChemistryChemistryISBN:9781305079113Author:David W. Oxtoby, H. Pat Gillis, Laurie J. ButlerPublisher:Cengage Learning