Be sure to answer all parts.Hydrofluoric acid, HF, has a K₂ of 6.8 × 104. What are [H3O+], [F], and [OH] in 0.680 M HF?[H3O+] = ||Ma[F]=M[OH-] =× 10M (Enter your answer in scientific notation.)

Given: Ka=6.8×10−4,[HF]=0.680M Let x be the concentration of [H3O+]and [F−]formed. The…

Answered: Be sure to answer all parts.…

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter12: Chemical Equilibrium

Section: Chapter Questions

Problem 12.62PAE: 12.62 Write the formula of the conjugate acid of each of the following bases, (a) OH-, (b) NHj, (c)...

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A Liquid HF undergoes an autoionization reaction: 2HFH2F++F (a) Is KF an acid or a base in this solvent? (b) Perchloric acid, HCIO4, is a strong acid in liquid HF. Write the chemical equation for the ionization reaction. (c) Ammonia is a strong base in this solvent. Write the chemical equation for the ionization reaction. (d) Write the net ionic equation for the neutralization of perchloric acid with ammonia in this solvent.
Calculate [OH-] and pH in a solution in which the hydrogen sulfite ion, HSO3-, is 0.429 M and the sulfite ion is (a) 0.0249 M (b) 0.247 M (c) 0.504 M (d) 0.811 M (e) 1.223 M
Two 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?
Classify each of the following as a strong or weak acid or base. a NH3 b HCNO c Mg(OH)2 d HClO3
The active ingredient formed by aspirin in the body is salicylic acid, C6H4OH(CO2H). The carboxyl group. (-CO2H) acts as a weak acid. The phenol group (an OH group bonded to an aromatic ring) also acts as an acid but a much weaker acid. List, in order of descending concentration, all of the ionic and molecular species present in a 0.001-M aqueous solution of C6H4OH(CO2H).
Draw a curve similar to that shown in Figure 14.23 for a series of solutions of NH3. Plot [OH-] on the vertical axis and the total concentration of NH3 (both ionized and nonionized NH3 molecules) on the horizontal axis. Let the total concentration of NH3 vary from 11010M to 1102M.
12.62 Write the formula of the conjugate acid of each of the following bases, (a) OH-, (b) NHj, (c) CHjNHt, (d) HPO/-, (e) CO.,2’
What is the concentration of H* in 0.042 M HCIO4? [H*] = i What is the pH of the solution? pH = M What is the OH- concentration in the solution? For scientific notations, use the format 1.0E-10, for example. [OH-] = i M By how much does the pH change if the concentration of H* is doubled? i
a Calculate the molar concentration of the following ion. OH in a solution that contains 1×10-¹¹ M H30+. (Enter your answer to one significant figure.) [OH-] = M b Calculate the molar concentration of the following ion. H3O+ in a solution that contains 1×10-4 M OH-. (Enter your answer to one significant figure.) [H3O+] = M C Calculate the molar concentration of the following ion. OH in a solution that contains 1×10-4 M H30+. (Enter your answer to one significant figure.) [OH-] = M
Strong acids and strong bases ionize 100% in aqueous solution.- HCl is a strong acid. In solution we write it as H+(aq) + Cl -(aq).- HF is a weak acid. In solution we write it as HF(aq).- KOH is a strong base. In solution we write it as K+(aq) + OH -(aq).- NH3 is a weak base. In solution we write it as NH3(aq).Exception: Since Ca(OH)2 is only slightly soluble we write it as Ca(OH)2(s).Below is a list of the 6 strong acids and 6 strong bases you should know. All other acids and bases are considered weak. Strong Acids Strong Bases HCl, HBr, HI LiOH, NaOH, KOH HNO3 Ca(OH)2 (slightly soluble) HClO4 Ba(OH)2 H2SO4 Sr(OH)2 What is the hydronium ion concentration in an aqueous hydrochloric acid solution with a pH of 4.250?[H3O+] = M
Strong acids and strong bases ionize 100% in aqueous solution.- HCl is a strong acid. In solution we write it as H+(aq) + Cl -(aq).- HF is a weak acid. In solution we write it as HF(aq).- KOH is a strong base. In solution we write it as K+(aq) + OH -(aq).- NH3 is a weak base. In solution we write it as NH3(aq).Exception: Since Ca(OH)2 is only slightly soluble we write it as Ca(OH)2(s).Below is a list of the 6 strong acids and 6 strong bases you should know. All other acids and bases are considered weak. Strong Acids Strong Bases HCl, HBr, HI LiOH, NaOH, KOH HNO3 Ca(OH)2 (slightly soluble) HClO4 Ba(OH)2 H2SO4 Sr(OH)2 Question 1)What is the hydronium ion concentration in an aqueous hydrobromic acid solution that has a pOH of 10.200?[H3O+] = M
Strong acids and strong bases ionize 100% in aqueous solution.- HCl is a strong acid. In solution we write it as H+(aq) + Cl -(aq).- HF is a weak acid. In solution we write it as HF(aq).- KOH is a strong base. In solution we write it as K+(aq) + OH -(aq).- NH3 is a weak base. In solution we write it as NH3(aq).Exception: Since Ca(OH)2 is only slightly soluble we write it as Ca(OH)2(s).Below is a list of the 6 strong acids and 6 strong bases you should know. All other acids and bases are considered weak. Strong Acids Strong Bases HCl, HBr, HI LiOH, NaOH, KOH HNO3 Ca(OH)2 (slightly soluble) HClO4 Ba(OH)2 H2SO4 Sr(OH)2 What is the pOH of an aqueous solution of 1.78E-2 M perchloric acid?pOH =

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Be sure to answer all parts. Hydrofluoric acid, HF, has a K₂ of 6.8 × 104. What are [H3O+], [F], and [OH] in 0.680 M HF? [H3O+] = || M a [F] = M [OH-] = × 10 M (Enter your answer in scientific notation.)