Concept explainers
(a)
Interpretation:
To determine the chemical equation for the reaction in which BeF2 is reduced to Be metal.
Concept introduction:
A chemical equation refers to the symbolic representation of a given
(b)
Interpretation:
To determine the chemical equation for the reaction of barium metal with liquid bromine.
Concept introduction:
A chemical equation refers to the symbolic representation of a given chemical reaction in the form of formulae and symbols where the product entities are present on the right-hand side of the chemical equation while the reactant entities are present on the left-hand side of the chemical equation.
(c)
Interpretation:
To determine the chemical equation for the reaction where reduction of Uranium (IV) oxide to uranium occurs in the presence of Ca metal as the reducing agent.
Concept introduction:
A chemical equation refers to the symbolic representation of a given chemical reaction in the form of formulae and symbols where the product entities are present on the right-hand side of the chemical equation while the reactant entities are present on the left-hand side of the chemical equation.
(d)
Interpretation:
To determine the chemical equation for the reaction in which calcination of dolomite takes place.
Concept introduction:
A chemical equation refers to the symbolic representation of a given chemical reaction in the form of formulae and symbols where the product entities are present on the right-hand side of the chemical equation while the reactant entities are present on the left-hand side of the chemical equation.
(e)
Interpretation:
To determine the chemical equation for the reaction in which phosphoric acid is completely neutralized with quicklime.
Concept introduction:
A chemical equation refers to the symbolic representation of a given chemical reaction in the form of formulae and symbols where the product entities are present on the right-hand side of the chemical equation while the reactant entities are present on the left-hand side of the chemical equation.
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EP GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
- The amount of sodium hypochlorite in a bleach solution can be determined by using a given volume of bleach to oxidize excess iodide ion to iodine; ClO- is reduced to Cl-. The amount of iodine produced by the redox reaction is determined by titration with sodium thiosulfate, Na2S2O3; I2 is reduced to I-. The sodium thiosulfate is oxidized to sodium tetrathionate, Na2S4O6. In this analysis, potassium iodide was added in excess to 5.00 mL of bleach (d=1.00g/cm3) . If 25.00 mL of 0.0700 M Na2S2O3 was required to reduce all the iodine produced by the bleach back to iodide, what is the mass percent of NaClO in the bleach?arrow_forwardThe reaction of calcium hydride, CaH2, with water can be characterized as a Lewis acid-base reaction: CaH2(s)+2H2O(l)Ca(OH)2(aq)+2H2(g) Identify the Lewis acid and the Lewis base among the reactants. The reaction is also an oxidation-reduction reaction. Identify the oxidizing agent, the reducing agent, and the changes in oxidation number that occur in the reaction.arrow_forwardWhen carbon dioxide dissolves in water it reacts to produce carbonic acid, H2CO3(aq), which can ionize in two steps. H2CO3(aq)HCO3(aq)+H+(aq)Kc1=4.2107HCO3(aq)CO32(aq)+H+(aq)Kc2=4.81011 Calculate the equilibrium constant for the reaction H2CO3(aq)CO32(aq)+2H+(aq)arrow_forward
- Give the formula for the acidic oxide of (a) HNO3 (b) HNO2 (c) H2SO4arrow_forwardThe amount of sodium hypochlorite in a bleach solution can be determined by using a given volume of bleach to oxidize excess iodide ion to iodine, because the reaction goes to completion. The amount of iodine produced is then determined by titration with sodium thiosulfate, Na2S2O3, which is oxidized to sodium tetrathionate, Na2S4O6. Potassium iodide was added in excess to 5.00 mL of bleach (density = 1.00 g/mL). This solution, containing the iodine released in the reaction, was titrated with 0.100 M Na2S2O3. If 34.6 mL of sodium thiosulfate was required to reach the endpoint (detected by disappearance of the blue color of the starch iodine complex), what was the mass percentage of NaClO in the bleach?arrow_forwardHow many liters (L) of hydrogen sulfide (at 25 ºC and 1.00 atm) are obtained if 3.52 g of ferrous sulfide (II) are added to 500 mL of 0.200 M hydrochloric acid solution? Note: We accept that 1 mol of gas, at a temperature of 25 ºC and a pressure of 1.00 atm, occupies a volume of 22.4 L (molar volume).arrow_forward
- Write a balanced ionic equation for the reaction of Fe²+, Fe³+, and OH to form magnetite, Fe3O4(S) H₂O may enter into the equationarrow_forwardCalculate the mass of Na2S2O3•5H2O needed to prepare a 1.00-liter solution of 0.0700 M concentration. Write the net ionic balanced equation for the redox reaction of iodate and iodide in acidic medium forming iodine and water. This is the pre-titration reaction. Write the net ionic balanced equation of iodine and thiosulfate forming iodide and tetrathionate, S4O62-. This is the titration reaction. Write the overall balanced equation for reactions 2 and 3. What is the expected color at this endpoint? Write the balanced net ionic equation when ascorbic acid, C6H8O6, reacts with iodine to form dehydroascorbic acid, C6H6O6 and iodide in acidic medium. This is second pre-titration reaction for the analysis of Vitamin C.arrow_forwardWhy is it not possible to plate a metal spoon with aluminium using 1.0M Al(NO3)3 (aq)?arrow_forward
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