Rank the acidity from most to least for given solutions. I. a solution with [H3O+] = 4.2 × 10−6 M II. Vinegar, pH = 2.65 III. 0.25 M hydrochloric acid IV. lime juice, pH = 3.10   a. II−IV−III−I   b. I−IV−II−III   c. IV−II−I−III   d. III−II−IV−I

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Calculate the pH and pOH of each of the following solutions. a. [H*] = 1.0×10¬M b. [H-] = 7.9x10--M c. [OH-] = 1.0x10-²M d. [OH-] = 2.3x10-³M

2. For each of the following salts, determine the pH of a 2.50M solution of the salt. You will need the Ka and Kb tables to complete this problem. a. NaBro wimm b. CH3NH3CI c. NaClO₂ d. C6H5OK e. CsNO3 f. C6H5NH3Br

One aqueous solution of a strong acid has pH = 1.20, another pH = 1.80. If equal volumes of these two solutions are combined, what is the pH of the resulting solution?   A.  1.35   B.  1.50   C.  1.40   D.  1.55   E.  1.10

Nicole and Patrick test the pH of four common kitchen substances and record the pH values in the table below. pH OF KITCHEN SUBSTANCES Substance pH Value Q 5 S 12 Which statement best compares Substance I to the other tested substances? A.O Substance T has the greatest concentration of H* ions. В. Substance T has the lowest H3O+ concentration in solution. C. Substance dissolves the fewest compounds. D.O Substance T contributes the most protons to water.

2. You are given three solutions: HCI (Solution A); NaOH (Solution B); pH = 8.76 solution (Solution S). You are asked to prepare the following solutions, starting with Solution S, and adding small amounts of Solution A or Solution B %3D to it. a. A solution of pH = 7.00 To Solution S, carefully add small amounts of Solution A/ Solution B (Circle one) till the required pH is reached. b. A solution of pH = 6.54 To Solution S, carefully add small amounts of Solution A / Solution B (Circle one) till the required pH is %3D reached. A solution of pH = 9.87 To Solution S, carefully add small amounts of Solution A / Solution B (Circle one) till the required pH is С. %3D reached.

3. Which of the following should produce the lowest pH when dissoived in water (assuming equal concentrations dissolved)? A. HCIO B. LIOH C. HC;H,O, D. HОCN

Predict whether aqueous solutions of the following compounds are acidic, basic, or neutral. compound solution is...? acidic NH₂Cl basic neutral acidic AI(CIO4)3 basic neutral acidic NaNO3 basic neutral X 5 ?

Using the pH reading, calculate the concentration of H3O^+ ions in    a. the most acidic solution  b. the least acidic solution