2. (a) Many main group oxides form acidic solutions when added to water. For example solidtetraphosphorous decaoxide reacts with water to produce phosphoric acid. Write a balancedchemical equation for this reaction.(b) Calcium phosphate reacts with silicon dioxide and carbon graphite at elevated temperaturesto produce white phosphorous (P4) as a gas along with calcium silicate (Silcate ion is SiO3²-)and carbon monoxide. Write a balanced chemical equation for this reaction.

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Answered: 2. (a) Many main group oxides form…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter19: The Chemistry Of The Main-group Elements

Section: Chapter Questions

Problem 23QRT

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Iodine can be prepared by allowing an aqueous solution of hydrogen iodide to react with manganese dioxide, MnO2. The reaction is 2I(aq)+4H+(aq)+MnO2(s)Mn2+(aq)+2H2O+I2(s) If an excess of hydrogen iodide is added to 0.200 g of MnO2, how many grams of iodine are obtained, assuming 100% yield?
Phosphorous acid, H3PO3, is oxidized to phosphoric acid, H3PO4, by nitric acid, which is reduced to nitrogen monoxide, NO. Write the balanced equation for this reaction.
4.48 Elemental phosphorous is used in the semiconductor industry. It can be obtained from an ore called fluoroapatite via reaction with SiO2 and C: 4Ca5( PO4)3F+18SiO2+30C3P4+30CO+18CaSiO3+2CaF2 Suppose a particular semiconductor production plant requires 1500 kg of P4. If the recovery of P4 from this reaction is 73% efficient, what mass of fluoroapatite is needed?
Solid boron can be extracted from solid boron oxide by reac- tion with magnesium metal at a high temperature. A second prod- uct is solid magnesium oxide. (a) Write a balanced equation for the reaction. (b) What mass of boron can be produced when 125 kg of boron oxide is heated with 125 kg of magnesium?
Complete and balance the following acid-base equations:(a) A solution of HClO4 is added to a solution of LiOH.(b) Aqueous H2SO4 reacts with NaOH.(c) Ba(OH)2 reacts with HF gas.
Consider the series of reactions to synthesize the alum (KAl(SO4 )2 · xH2O(s)) from the introduction. Assuming an excess of the other reagents, from one mole of potassium hydroxide KOH, how many moles of alum will be produced?
Write a balanced equation for each of the following: (a) A characteristic reaction of Group 1A(1) elements: chunks of sodium react violently with water to form hydrogen gas and sodium hydroxide solution. (b) The destruction of marble statuary by acid rain: aqueous nitric acid reacts with calcium carbonate to form carbon dioxide, water, and aqueous calcium nitrate. (c) Halogen compounds exchanging bonding partners: phosphorus trifl uoride is prepared by the reaction of phosphorus trichloride and hydrogen fl uoride; hydrogen chloride is the other product. The reaction involves gases only.
(i) How is HNO3 prepared commercially?(ii) Write chemical equations of the reactions involved.(iii) What concentration by mass of HNO3 is obtained?
7. (a) Write a complete, balanced chemical equation to show how sodium carbonate removes calcium ions and magnesium ions irom hard water.
A mixture of xenon and fluorine was heated. A sample of the white solid that formed reacted with hydrogen to yield 81 mL of xenon (at STP) and hydrogen fluoride, which was collected in water, giving a solution of hydrofluoric acid. The hydrofluoric acid solution was titrated, and 68.43 mL of 0.3172 M sodium hydroxide was required to reach the equivalence point. Determine the empirical formula for the white solid and write balanced chemical equations for the reactions involving xenon.
Consider the series of reactions to synthesize the alum (KAl(SO4 )2 · xH2O(s)) Assuming an excess of the other reagents, from one mole of aluminum Al (s), how many moles of alum will be produced?
What mass of sodium hydroxide ,NaOH, would be required to produce 5.97 g of the antacid milk of magnesia,Mg(OH)2,by the reaction of MgCl2with NaOH

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