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The anion of sodium monohydrogen phosphate,
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Chapter 15 Solutions
CHEMISTRY:MOLECULAR NATURE (LL)W/ACCESS
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- Hydrogen, H2S, and sodium acetate, NaCH3CO2 are mixed in water. Using Table 16.2, write a balanced equation for the acid-base reaction that could in principle, occur. Does the equilibrium lie toward the products or the reactants?arrow_forwardPhosphoric acid, H3PO4, has three protons that can ionize. Write the equations for its three ionization reactions, each of which is a dynamic equilibrium.arrow_forwardTwo strategies are also followed when solving for the pH of a base in water. What is the strategy for calculating the pH of a strong base in water? List the strong bases mentioned in the text that should be committed to memory. Why is calculating the pH of Ca(OH)2 solutions a little more difficult than calculating the pH of NaOH solutions? Most bases are weak bases. The presence of what element most commonly results in basic properties for an organic compound? What is present on this element in compounds that allows it to accept a proton? Table 13-3 and Appendix 5 of the text list Kb values for some weak bases. What strategy is used to solve for the pH of a weak base in water? What assumptions are made when solving for the pH of weak base solutions? If the 5% rule fails, how do you calculate the pH of a weak base in water?arrow_forward
- Students are often surprised to learn that organic acids, such as acetic acid, contain OH groups. Actually, all oxyacids contain hydroxyl groups. Sulfuric acid, usually written as H2SO4, has the structural formula SO2(OH)2, where S is the central atom. Identify the acids whose structural formulas are shown below. Why do they behave as acids, while NaOH and KOH are bases? a. SO(OH)2 b. ClO2(OH) c. HPO(OH)2arrow_forwardA scientist has synthesized a diprotic organic acid, H2A, with a molar mass of 124.0 g/mol. The acid must be neutralized (forming the potassium salt) for an important experiment. Calculate the volume of 0.221 M KOH that is needed to neutralize 24.93 g of the acid, forming K2A.arrow_forwardTwo chemical reactions are listed. In one of them, the phosphorus-containing anion on the left is a Brønsted acid, and in the other reaction, the phosphorus-containing anion on the left is a Brønsted base. Identify in which reaction it is a Brønsted acid. О н,РО, (аq) + CH;CO, (аq) — НРО,* (аq) + CH;CO2H(aq) НРО * (аq) + HСО; (аq) — Н,РО, (аq) + СОз* (аq)arrow_forward
- Iron in drinking water is removed by precipitation of the Fe3+ ion by reaction with NaOH to produce iron(III) hydroxide. Write the balanced chemical equation and the net ionic equation for this reaction.arrow_forwardWhat is the equilibrium constant expression (Ka) for the acid dissociation of hypochlorous acid? HClO(aq)+H 2 O(l) H 3 O^ + (aq)+ClO-(aq) . a) Ka=[H 3 O^ + ]+[ClO-]-[HClO]; b) Ka=([HClOl[H 2 O]/([H 3 O^ + ][ClO-]); c) Ka=([H 3 O^ + ][ClO-])/([HClO][H 2 O]; d) Ka=(IH 3 O^ + ][ClO-])/[HClO]arrow_forwardDefine pH in words. The strong acid HClaq has a pH value of 1, use the following equation for a strong acid: HClaq à H+aq + Cl-aq and convert the following expression to deduce the hydrogen ion concentration: pH = -log10 [H+] (ii) Use the above expression to deduce the pH of HCl (aq) given the concentration of the acid to be 4.5 mol/dm3arrow_forward
- Which of these is NOT an example of a strong base? O All of these are strong bases Ba(OH)2 ONH4OH O Sr(OH)2 O Ca(OH)2arrow_forwardThe acidity of a solution is measured by its pH. If Ht represents the concentration of hydrogen ions (in moles/liter) in the solution, the pH is defined by pH = – log H+ Based on careful measurements and calculations, a chemist examines two solutions and asserts: "The hydrogen ion concentration of Solution A is 158 times greater than the hydrogen ion concentration of Solution B." If the pH of solution B is 3.4, determine the pH of Solution A. Report your answer to one decimal place. Solution A has pH equal to Number (Report to the nearest 0.1)arrow_forwardLactic acid, HC3H5O3, is a weak acid; write an equation for its ionization in aqueous solution. If 0.15 M solution of lactic acid has pH = 2.34, calculate the molar concentration of H3O+in the solution. What are the Ka of lactic acid and the degree of ionization of the acid?arrow_forward
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