Concept explainers
Many acids are partially dissociated into ions in aqueous solution. Trichloroacetic acid (CCl3CO2H), for instance, is partially dissociated in water according to the equation
What is the percentage of molecules dissociated if the freezing point of a 1.00 m solution of trichloroacetic acid in water is −2.53 °C?
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Chapter 11 Solutions
General Chemistry: Atoms First
- How many ions, per formula unit, are produced when each of the following soluble salts (strong electrolytes) dissolves in water? a. NaCl b. Mg(NO3)2 c. K2S d. NH4CNarrow_forwardConsider the following chemical equilibrium for the weak base CN in water: CN- (aq) + H₂O(1) = HCN (aq) + OH(aq). Which of the following statements is correct when more water is evaporated from system? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b C d pH will go up; [OH-] will go up; net amount of OH will go up pH will go down; [OH-]will go up; net amount of OH will go down pH will go down; [OH-]will go down; net amount of OH will go down pH will go up; [OH-] will go up; net amount of OH will go downarrow_forward11. The structural formulae of two amino acids are shown below. || НООС - СH-CH, - CH-С -ОН NH2 Glutamic acid (glu) When glutamic acid dissolve in aqueous sodium hydroxide, monosodium glutamate (MSG) is formed, which is used as a flavor enhancer. Write an equation for the formation of MSG. Predict whether a solution of glutamic acid is acidic, basic or neutral. Explain your answer.arrow_forward
- Indicate how the concentration of each aqueous species in the chemical equation changes to reestablish equilibrium after changing the concentration of a reactant or product. Also indicate how the pH changes. An up arrow indicates an increase in concentration, a down arrow indicates a decrease in concentration, and leaving it blank means there is no change in the concentration. HC\(aq)+H,O()=CN (aq)+H,0*(aq) pH after the concentration of HCN is increased after the concentration of CN is decreased Answer Bank careers privacy poliy thelp 口 )arrow_forwardAt a particular temperature, aluminum hydroxide , Al(OH)3, has a Ksp = 2.52×10-31. What is the hydroxide ion concentration in a saturated aluminum hydroxide solution?arrow_forwardAn aqueous solution of formic acid, that is 1.00 percent by weight formic acid, has a density of 1.0006 g/mL. A student determines that the freezing point of this solution is -0.418 °C. Based on the observed freezing point, what is the percent ionization of the acid and the value of Ka? Kf for H2O is 1.86 °C/m. % ionized = % Ka =arrow_forward
- The binding of oxygen by hemoglobin (Hb), giving oxyhemoglobin (HbO2), is partially regulated by the concentration of H3O+ and dissolved CO2 in the blood. Although the equilibrium is complicated, it can be summarized asHbO2(aq) + H3 O+(aq) + CO2(g) ⇌ CO2 −Hb−H+ + O2(g) + H2 O(i)(a) Write the equilibrium constant expression for this reaction.(b) Explain why the production of lactic acid and CO2 in a muscle during exertion stimulates release of O2 from the oxyhemoglobin in the blood passing through the muscle.arrow_forwardHypochlorous acid (HOCl) has an ionization constant of 3.2 × 10 -8. What is its percent ionization in 1.0 M and 0.10 M solutions, respectively?arrow_forwardSuppose a 0.040M aqueous solution of oxalic acid (H2C2O4) is prepared. Calculate the equilibrium molarity of C2O4 2−. You'll find information on the properties of oxalic acid in the ALEKS Data resource. Round your answer to 2 significant digits.arrow_forward
- The pHpH of a solution of Ba(OH)2Ba(OH)2 is 10.66 at 25∘C.25∘C. What is the hydroxide ion concentration in the solution? If the solution volume is 125mL125mL what mass of Ba(OH)2Ba(OH)2 must have been dissolvedarrow_forward1. The ionization constant (Kb) of aniline (C6H5NH2) is 2.35 x 10^-5. If 7.285 grams of aniline is dissolved in 100.0 mL of water, what are the equilibrium concentration of all species present?2. A certain acidic vitamin is essential for all mammals since it plays a role in DNA repair and cell signaling. A 0.439M solution of this acid is found to have a pH of 2.607. Based on the table below, what most likely is the identity of thisunknown acid?arrow_forwardCalculate the equilibrium Molarity of HPO4^2-arrow_forward
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage Learning