What is the change in the oxidation number of chromium in the following? K2CrO4 → Cr2(SO4)3 O Increase by three units. Increase by four units. Decrease by four units. Decrease by three units.

Q: What is the oxidation number of Cl in the hypochlorite ion?

A:

Q: What class of element is obtained by oxidation of a mineral? What class of element is obtained by…

A:

Q: Explain how EDTA interacts with a metal? Why do we use it as a titrating agent? Why is EDTA a common…

A: Answer- EDTA is a versatile chelating agent. It can form four or six bond with metal ion and it form…

Q: Explain why iron and manganese exist in the lower oxidation states at the bottom of large eutrophic…

A:

Q: When a strip of Mn is placed in a solution of Cr(NO3)3 , a deposit of chromium metal forms and…

A:

Q: 1. When 1.164 g of a certain metal sulfide was roasted in air, 0.972 g of the metal oxide was…

A: #Q.1: Both sulfide(S2-) and oxide(O2-) have same charge of -2. The charge on the unknown metal(M) is…

Q: A -1 B +2 C +4 E 4

A:

Q: Vanadium could be oxidized to vanadium (II) ions thru the action of zinc powder and an acid True or…

A: Oxidation is a process that involves  loss of electrons and reduction is a process that involve gain…

Q: Copper corrodes to cuprous oxide, Cu2O, or cupric oxide, CuO, depending on environmental…

A: The oxidation state of copper in cupric oxide is to be calculated

Q: Which of the following species contains manganese with the highest oxidation number? A) Mn B) MNF2…

A: Oxidation of Mn in elemental state is 0

Q: What are the three ingredients used in a blast furnace to make iron? Which one of these is the…

A:

Q: Given the reaction: Fe*2 + Cr207 -2 - Fe*3• cr*3 How many electon/s was/were gained in the reduction…

A:

Q: Indicate the oxidation number of the metal for Na2[CdBr4]

A: Given compoundNa2[CdBr4]Oxidation state of Metal = To be determined

Q: In the equation below, what chemical process did copper undergo? oxidized or reduced __________…

A:

Q: What is the oxidation number of the Chromium atom in K2Cr2O7?

A: Oxidation number is the number of electrons gained or lost by an element.

Q: What is the oxidation state of iron in K4Fe(CN)6? O a 2+ Ob 4+ Oc. 6+ Od 3+

A: Oxidation number of a neutral  molecule is always zero. Using this concept, we can determine the…

Q: What is the oxidation number of carbon in the oxalate ion, C2042?

A:

Q: Draw the structure of MnO2

A: Molecular geometry is the 3-D representation of the molecule in a space. As the Lewis model is not…

Q: Indicate the coordination number and the oxidation number of the metal for [Zn(en)2]Br2

A: Coordination number of Zn in [Zn(en)2]Br2:Coordination number is the ligands attached to the central…

Q: What is happening to the iridium in this reaction ? Ir(CO3)2 + Fe → Ir + Fe(CO3)3 A. oxidation B.…

A: Oxidation is loss of electrons. Reduction is gain of electron.

Q: When copper is purified using an electrochemical cell, which electrode has the pure copper and which…

A: The electrolytic cell process is used for the purification of a number of metals. The cathode is the…

Q: what is the pH of bleach with [H3O+]=4.2*10-12 M

A:

Q: Ca (a) 3 8.

A:

Q: what is the oxidation number of oxygen atoms in MnO2?

A: The oxidation number is zero for the summation of the oxidation numbers complete atoms in a complete…

Q: Determine the chemical equation for the reaction between Fe3+ and Cu2+ with NH3.

A: Ammonia is the weak base.  It is used in the aqueous form.  The reaction of ammonia with the given…

Q: In the analysis of bleach solution, what are the initial oxidation states of iodine in KIO3 and KI…

A:

Q: What is the coordination number of a metal ion in a complexion? How does it differ from oxidation…

A: Coordination number is defined as the number of the ligands which are immediately surrounded or…

Q: Write the balanced equation that shows the reaction that occurs when 1.0 M CrCl3 undergoes…

A: To write the balanced chemical equation when 1.0 M CrCl3 is undergoes electrolysis

Q: What factors determine which reducing agent is selected for producing a specific metal?

A: The reactions in which oxidation and reduction happen simultaneously are called redox reactions.…

Q: What would you use to prove that copper is reduced in the following reaction? Fe) + CuSO4(q) →…

A: Given reaction: Fe(s) + CuSO4 (aq) → FeSO4 (aq) + Cu(s) We have to prove why copper is reduced in…

Q: What class of element is obtained by oxidation of a mineral?What class of element is obtained by…

A:

Q: What is the oxidation number of the chromium atom in K7Cr2O7?

A: Given-> I think there is  K2Cr2O7

Q: What is the oxidation number of the chromium atom in K2Cro4?

A:

Q: MnO−4 reacts with Fe2+ in acid solution to produce Fe3+ and Mn2+.  Write a balanced equation for…

A: From the given information, the half reactions are, Oxidation half reaction is, Reduction half…

Q: 9: Which of the following process consumes hydrogen? (a) FCC process (b) Hydrocracking process (c)…

A: Given,  Which of the following process consumes hydrogen.

Q: What is the chemistry behind why rusting occurs rapidly in moist conditions as compared to a dry…

A: why rusting occurs rapidly in moist conditions as compared to a dry environment? The reason is given…

Q: >Describe the effects of adding Mn to steel and give a use for manganese–steel alloys.

A: Manganese is generally added to steel to change its physical properties. Addition of Manganese to…

Q: Which of the following acids would be capable of reacting with a silicate (SiO2) mineral? A) HF B)…

A: silicon dioxide generally Known as silicate not easily reactive with acids in normal conditions but…

Q: What is the oxidation number of molybdenum in sodium molybdate (Na2MoO4)? (Sodium has an oxidation…

A: Sodium molybdate = Na2MoO4 Sodium(Na) has +1 oxidation number  Let x is the oxidation number of Mo

Q: Why some of the heavier p block elements shows two oxidation states?

A: A species gains or loses electrons to form anions or cations respectively. A gain in electron is…

Q: Assign the oxidation number of the chrome in Cr₂(SO4)3 a. O b. -0.5 C. +3 d. -1

A:

Q: 9. Which cannot be oxidized by hot acidic KMNO4? 10. Two molecules of this compound cannot exhibit…

A: A question based on properties of chemical compounds, which is to be accomplished.

Q: Write the complete chemical equation of leaching Cuo in acidic solution which produces Cu²* ions.…

A: Leaching CuO in acidic solution which produces Cu2+ ions. We have to write the complete chemical…

Q: oxidative

A:

Q: What quantity of energy, ΔH, can be obtained from roasting of 35g of zinc sulfide ore? ZnS(s) +…

A:

Q: A reference book lists the chemical formula of one form of vermiculite as [(Mg2.36FE0.48…

A: Oxidation can be explained in many ways. Oxidation is the addition of oxygen/removal of…