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A: Dear student I have given answer to your question in the image format.
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For each pair of bases shown below, circle the stronger base.
a. Te^2- or Se^2-
b. SO3^2- or SO4^2-
c. PO4^3- or AsO4^3-
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- 9. What is the concentration of hydronlum (H0), the pH is 1.257 Write your answer to 3 significant figures in decimal form. Type your answer. 10 What is the concentration of hydroxide OHir the concentration of hydronium is HsO 4.698 x 10 MISolve to 3 signiicant figures and use decimal form. Type your answer.Part 1 of 2 Determine the pH of a 0.25 M NH3 solution. Be sure your answer has the correct number of significant digits. Note: K for NH3 is 1.78 × 10-5 pH = Part 2 of 2 x10 Determine the pH of a solution that is 0.25 M NH3 and 0.35 M NH4Cl. Be sure your answer has the correct number of significant digits. pH = XThe pH scale was designed to make it convenient to express hydrogen ion concentrations that are small in aqueous solutions. The definiton of pH is in terms of base 10 logarithms. pH = - log[H*] where [H*] is the hydrogen ion concentration. a. If the hydrogen ion concentration in a solution is 7.26 x 10 mol L, the pH is b. If the pH of a solution is 3.607, the hydrogen ion concentration is mol L.
- 1a. Which of the following statements about pure acids is correct?A. All are covalent compounds.B. All contain hydrogen ions.C. All are liquids at room conditions.D. All have sour smell. 1b. Which of the following is NOT a characteristic property of dilute aqueous acids?A. It turns wet blue litmus paper red.B. It reacts with copper to give hydrogen.C. It conducts electricity.D. It reacts with copper(II) carbonate to give carbon dioxide. 1c. Which of the following acids is a dibasic acid?A. Sulphuric acidB. Ethanoic acidC. Nitric acidD. Hydrochloric acid1 Which of these is a base? a. NaHCO3 b. HNO3 c. H3PO4 d. NaCl e. H2O 1b. Which of these is the active ingredient in vinegar? A. Calcium hydroxide B. Sulfuric acid C. Phosphoric acid D. ammonium phosphate E. acetic acid 1c. Which of these is an acid? A. NaHCO3 B. H2SO4 C. (NH4)2SO4 D. NaCl E. NH3 1D. Which one has the lowest concentration of H3O+ ions? A. 1.0 x 10-1 M HCl B. 1.0 x 10-2 M HCl C. 1.0 X 10-3 M HCl D. 1.0 x 10-4 M HCl E. 1.0 x 10-5 M HClYou have a 2.00 × 10−4 M solution of HNO3 at 25 °C. What is [OH−] in this solution? A. 2.00 × 10−10 M B. 2.00×10−4 M C. 5.05×10+5 M D. 5.05 × 10−11 M
- The pH scale was designed to make it convenient to express hydrogen ion concentrations that are small in aqueous solutions. The definiton of pH is in terms of base 10 logarithms. pH = - log [H*] where H+] is the hydrogen ion concentration. a. If the hydrogen ion concentration in a solution is 3.49 x 10-8 mol/L, the pH is b. If the pH of a solution is 3.688, the hydrogen ion concentration is mol/L.The pH scale was designed to make it convenient to express hydrogen ion concentrations that are small in aqueous solutions. The definiton of pH is in terms of base 10 logarithms. pH = -log[H¹] where [H] is the hydrogen ion concentration. a. If the hydrogen ion concentration in a solution is 5.98 x 10-3 mol/L, the pH is b. If the pH of a solution is 3.171, the hydrogen ion concentration is mol/L.Potassium is a very reactive metal, but in compounds it is present as the potassium ion and is not very reactive. For example, dry potassium bicarbonate powder can be used to extinguish burning liquids. Why is there such a difference in the reactivity of potassium metal and the potassium ion? A. The potassium in the bicarbonate salt is a base, but the potassium metal is an acid. B. The potassium in the bicarbonate salt is an acid, but the potassium metal is a base. C. The combustion of the liquids suppresses the potassium's ability to react. D. The potassium metal can readily ionize by losing its one valence electron; the potassium in the bicarbonate salt is already ionized. E. The potassium atom is bonded to an oxygen atom in the bicarbonate salt, but in the metal it is unbound and free to react.
- -6 An aqueous solution at 25 °C has a H,0 concentration of 4. x 10 M. Calculate the OH con | M x10Sodium hydroxide is a strong base. This means that __________. *9. A solution of 40ml containing 15 grams of sodium hydroxide is analyzed. a. What is the concentration of the solution? O 4.7M 10 M 3.7 M 9.4 M 8 00:56:26 PREVIOUS 9 of 9 SAVE & esc 2
