Concept explainers
(a)
Interpretation: The reaction
Concept introduction:As per law of mass conservation, the total reactant’s mass must always be equal to the product’s mass. In order to abide by this law, the equations are balanced. A balanced reaction implies that the atoms of every element on reactant’s side must definitely be equal atoms of every element on product’s side.
(b)
Interpretation: The reaction between silicon tetrachloride and magnesium producing silicon and magnesium chloride is to be balanced.
Concept introduction:As per law of mass conservation, the total reactant’s mass must always be equal to the product’s mass. In order to abide by this law, the equations are balanced. A balanced reaction implies that the atoms of every element on reactant’s side must definitely be equal atoms of every element on product’s side.
(c)
Interpretation: The reaction
Concept introduction:As per law of mass conservation, the total reactant’s mass must always be equal to the product’s mass. In order to abide by this law, the equations are balanced. A balanced reaction implies that the atoms of every element on reactant’s side must definitely be equal atoms of every element on product’s side.
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Chemical Principles
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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?arrow_forwardWrite 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_forward4.22 Generally, an excess of O2 is needed for the reaction Sn+O2SnO2 . What is the minimum number of moles of oxygen required to oxidize 7.3 moles of tin?arrow_forward
- Write balanced net ionic equations for the following reactions in acid solution. (a) Liquid hydrazine reacts with an aqueous solution of sodium bromate. Nitrogen gas and bromide ions are formed. (b) Solid phosphorus (P4) reacts with an aqueous solution of nitrate to form nitrogen oxide gas and dihydrogen phosphate (H2PO4-) ions. (c) Aqueous solutions of potassium sulfite and potassium permanganate react. Sulfate and manganese(II) ions are formed.arrow_forwardSilicon is produced for the chemical and electronics industries by the following reactions. Give the balanced equation for each reaction. a. SiO2(s)+C(s)arefurnaceElectricSi(s)+CO(g) b. Liquid silicon tetrachloride is reacted with very pure solid magnesium, producing solid silicon and solid magnesium chloride. c. Na2SiF6(s) + Na(s) Si(s) + NaF(s)arrow_forwardWrite balanced chemical equations for the following reactions. (a) The reaction of aluminum and iron(III) oxide to form iron and aluminum oxide (known as the thermite reaction). (b) The reaction of carbon and water at high temperature to form a mixture of gaseous CO and H2 (known as water gas and once used as a fuel). (c) The reaction of liquid silicon tetrachloride and magnesium forming silicon and magnesium chloride. This is one step in the preparation of ultrapure silicon used in the semiconductor industryarrow_forward
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