(a)
Interpretation:
The balanced chemical equation for the reaction of
Concept introduction:
A balance equation has the equal number of atoms on the left hand side as well as on the right hand side.
(b)
Interpretation:
The balanced chemical equation for the oxidation of
Concept introduction:
A balance equation has the equal number of atoms on the left hand side as well as on the right hand side.
(c)
Interpretation:
The balanced chemical equation for the reaction of
Concept introduction:
A balance equation has the equal number of atoms on the left hand side as well as on the right hand side.
(d)
Interpretation:
The balanced chemical equation for the oxidation of Cu(s) to
Concept introduction:
A balance equation has the equal number of atoms on the left hand side as well as on the right hand side.
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GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
- The photograph below shows what occurs when a solution of potassium chromate is treated with a few drops of concentrated hydrochloric acid. Some of the bright yellow chromate ion is converted to the orange dichromate ion. 2 CrO42(aq) + 2 H3O+(aq) CrO72(aq) + 3 H2O() (a) Explain this experimental observation in terms of Le Chateliers principle. (b) What would you observe if you treated the orange solution with sodium hydroxide? Explain your observation.arrow_forwardWhich of the following statements is not correct? (a) The ease of oxidation of the halide ions is F Cl Br I. (b) Fluorine is the most abundant halogen in the Earths crust. (c) F2 is prepared industrially by electrolysis of aqueous NaF. (d) HF is used to etch glass.arrow_forwardDetermine the oxidation state of sulfur in SF6, SO2F2, and KHS.arrow_forward
- Which of the following elements is most likely to be used to prepare La by the reduction of La2O3: Al, C, or Fe? Why?arrow_forwardThree reactions very important to the semiconductor industry are The reduction of silicon dioxide to crude silicon, SiO2(s) + 2 C(s) → Si(s) + 2 CO(g) ΔrH° = 689.9 kJ/mol The formation of silicon tetrachloride from crude silicon, Si(s) + 2 Cl2(g) → SiCl4(g) ΔrH° = −657.01 kJ/mol The reduction of silicon tetrachloride to pure silicon with magnesium, SiCl4(g) + 2 Mg(s) → 2 MgCl2(s) + Si(s) ΔrH° = −625.6 kJ/mol Calculate the overall enthalpy change when 1.00 mol sand, SiO2, changes into very pure silicon by this series of reactions.arrow_forwardSome of the substances commonly used in stomach antacids are MgO, Mg(OH)2, and Al(OH)3. a. Write a balanced equation for the neutralization of hydrochloric acid by each of these substances. b. Which of these substances will neutralize the greatest amount of 0.10 M HCl per gram?arrow_forward
- One of the few industrial-scale processes that produce organic compounds electrochemically is used by the Monsanto Company to produce1,4-dicyanobutane. The reduction reaction is 2CH2CHCH+2H++2eNC(CH2)4CN The NC(CH2)4CN is then chemically reduced using hydrogen gas to H2N(CH2)6NH2, which is used in the production of nylon. What current must be used to produce 150.kg NC(CH2)4CN per hour?arrow_forwardThe Ostwald process for the commercial production of nitric acid involves the Following three steps: 4NH3(g)+5O2(g)4NO(g)+6H2O(s)2NO(g)+O2(g)2NO2(g)3NO2(g)+H2O(l)2HNO3(aq)+NO(g) a. Which reaction in the Ostwald process are oxidation-reduction reactions? b. Identify each oxidizing agent and reducing agent.arrow_forwardWrite a balanced chemical equation for the reaction of an excess of oxygen with each of the following.. Remember that oxygen is a strong oxidizing agent and tends to oxidize an element to its maximum oxidation state. (a) Mg. (b) Rb. (c) Ga. (d) C2H2. (e) COarrow_forward
- Order the following molecules from lowest to highest oxidation state of the nitrogen atom: HNO3, NH1Cl, N2O, NO2, NaNO2.arrow_forwardElectrolysis of an alkaline earth metal chloride using a current of 5.00 A for 748 seconds deposits 0.471 g of metal at an electrode. Is the metal deposited at the cathode or the anode of the electrolytic cell? What is produced at the other electrode? What is the identity of the alkaline earth metal?arrow_forwardUsing circles to represent cations and squares to represent anions, show pictorially the reactions that occur between aqueous solutions of (a) Fe3+ and OH-. (b) Na+ and PO43-.arrow_forward
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