Concept explainers
Interpretation:
The reason should be determined for expected reasonably the chemistry of dichromate ion which involves mostly in
Concept introduction:
The term oxidation refers to the loss of electrons by a chemical species and the term reduction refers to the gain of electrons by a chemical species. Oxidation -reduction reactions are those
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GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
- (A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true but the second is false, and (D) if the first sentence is false but the second is true. 1. In oxygen fixation, the alkaline-iodide-azide solution was used to acidify the solution. The brown hydrated precipitate that formed in the process of oxygen fixation was magnesium hydroxide. 2.Visual inspection is enough to determine if water is of appropriate quality. The standards for drinking water quality are typically set by governments or by international standards. 3.Deeper levels of water often do not reach 100% air saturation equilibrium because they are not shallow enough to be affected by the waves and photosynthesis at the surface. The dissolved oxygen content is an important index when considering its suitability for town supply. 4. The normality (N) of a solution is determined by multiplying the molarity of the solution by its volume. In the standardization of the sodium thiosulfate…arrow_forward1) The amount of warfarin, used for anticoagulant medications, in a sample was calculated as follows. A 13.96 g sample was first treated with an alkaline I2 solution to convert C19H1604 to CHI3. This treatment gives one mole of CHI3 for every mole of C19H1604 that was initially present in the sample. The iodine in CHI3 is then precipitated as AgI(s) by treatment with excess AgNO3(aq): CHI3(aq) + 3AgNO3(aq) + H20(1) → 3A£I(s) + 3HNO3(aq) + CO(g) If 0.1386 g solid AgI were obtained, then what is the percentage by mass of warfarin in the sample analyzed?arrow_forwardExplain the following observations giving appropriate reasons: (i) The stability of +5 oxidation state decreases down the group in group 15 of the periodic table. (ii) Solid phosphorus pentachloride behaves as an ionic compound. (iii) Halogens are strong oxidizing agents.arrow_forward
- The equilibrium constant for the disproportionation copper(I) shown below is 1.81 x 106. If the copper(I) ion is dissolved in dimethylsulfoxide as a solvent the equilibrium constant is only approximately 2. Provide an explanation for the observation.arrow_forwardGive the oxidation state of the metal for each of the following oxides of the first transition series. (Hint: Oxides of formula M3O4 are examples of mixed valence compounds in which the metal ion is present in more than oneoxidation state. It is possible to write these compound formulas in the equivalent format MO∙M2O3, to permit estimation of the metal’s two oxidation states.)(a) Sc2O3(b) TiO2(c) V2O5(d) CrO3(e) MnO2(f) Fe3O4(g) Co3O4(h) NiO(i) Cu2Oarrow_forwardDefine the following phenomena with reference to main group compounds: (c) dependence of acidity and basicity on oxidation statearrow_forward
- Complete the equation for the reaction of NaHCO3(s) with HC2H3O2(aq). Include phase symbols.arrow_forwarda) Which ion, Pt(II) or Mn(II), is more likely to form a sulfide in the presence of H2S in water. b) Rationalize your answer with the trends in hard and soft character. c) Give a balance chemical equation from your reaction.arrow_forwardWhich is the least reactive alkali metal? Why is this not expected based on standard oxidation potentials? Explain why.arrow_forward
- Calculate the equilibrium concentration of N2O4 in 1.00 L of a solution prepared from 0.129 mol of N2O4 with chloroform as the solvent. (Assume that the change in concentration of N2O4 is small enough to be neglected).arrow_forwardg) Taking the periodic table as a whole, discuss the trends in atomic radii evident in the table. Include in your answer a discussion on how one could use the identified trends to predict relevant reactivity of the elements towards (a) oxidation and (b) reductionarrow_forwardMetal oxides tend to be basic and react with acids True or False?arrow_forward
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