Concept explainers
(a)
Interpretation: To draw the structure of
Concept introduction: polyphosphoric acids have linear chains and hence are called linear polyphosphoric acids. In the structure of polyphosphate ion,
Polymetaphosphates are the salts of polymetaphosphoric acids. These acids are represented by the general formula
(b)
Interpretation: To draw the structure of
Concept introduction: polyphosphoric acids have linear chains and hence are called linear polyphosphoric acids. In the structure of polyphosphate ion,
Polymetaphosphates are the salts of polymetaphosphoric acids. These acids are represented by the general formula
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CHEMISTRY+CHEM.REACT.(LOOSE)-W/ACCESS
- The 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_forwardEach of the chemically active Period 2 elements forms stable compounds in which it has bonds to fluorine. (a) What are the names and formulas of these compounds? (b) Does ∆EN increase or decrease left to right across the period? (c) Does percent ionic character increase or decrease left to right? (d) Draw Lewis structures for these compoundsarrow_forwardAt 400 °C, the AG an for the oxidation of a monoatomic liquid element Z in the presence of 02(g) forming ZO) is -25.0 kJ per mol O2. In the compound ZOs, Z has a +2 formal charge. Which of the following statements is CORRECT? The oxidation of Z with O2 is marked by an increase in entropy. O Z cannot be oxidized to Z0 because Z is more stable than ZO at 400 °C or any T above it. O The oxidation of Z with 02 is exothermic, O zo cannot be reduced back to Z at any temperature because reduction of ZO to Z has +AG.arrow_forward
- Would you expect potassium perchlorate, KClO4(aq), in a concentrated acidic solution to act as an oxidizing agent or as a reducing agent?arrow_forwardAt 400 °C, the AG°an for the oxidation of a monoatomic liquid element Z in the presence of O2(9) forming ZO() is -25.0 kJ per mol 02. In the compound zo(e), Z has a +2 formal charge. Which of the following statements is CORRECT? O Z cannot be oxidized to ZO because Z is more stable than ZO at 400 °C or any T above it. O zo cannot be reduced back to Z at any temperature because reduction of ZO to Z has +AG. O The oxidation of Z with 02 is exothermic. The oxidation of Z with 02 is marked by an increase in entropy.arrow_forwardComplete and balance the following equations. Write the entire equation, including the reactants and products, and include the physical state of each species. (Click in the answer box to activate the palette.) (a) K(s) + H2O(I) → (b) NaH(s) + H20(1) –arrow_forward
- For the lons Pb+4. between them? and Te 2, what are the subscripts in the formula of the molecule that forms Pb Tearrow_forwardWhich of the following statements are true?(a) Both nitrogen and phosphorus can form a pentafluoridecompound.(b) Although CO is a well-known compound, SiO does notexist under ordinary conditions.(c) Cl2 is easier to oxidize than I2.(d) At room temperature, the stable form of oxygen is O2,whereas that of sulfur is S8.arrow_forwardDraw a Lewis structure for each species:(a) The cyclic silicate ion Si6O1812-(b) A cyclic hydrocarbon with formula C6H12arrow_forward
- Compounds such as NaBH4, Al(BH4)3, and LiAlH4 are complexhydrides used as reducing agents in many syntheses.(a) Give the oxidation state of each element in these compounds.(b) Write a Lewis structure for the polyatomic anion in NaBH4, and predict its shape.arrow_forwardDraw a Lewis structure for(a) The cyclic silicate ion Si₄O₁₂⁸⁻(b) A cyclic hydrocarbon with formula C₄H₈arrow_forwardComplete 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.arrow_forward
- Chemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStaxChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning