For nitrous acid, HNO2, Ka 4.0 × 10−4. Calculate the pH of 50 g of HNO2 dissolved in enough water to obtain a 200 mL of solution. 8.4 12.2 0 4.6 1.02 3.2 Previous page ____ Next page

A sample of water from a stream has [H3O*]=3.1 × 10-9 M. Which statement below accurately describes this water sample? A. The water sample is acidic. B. The water sample is a basic solution. C. The pOH of the water sample is 8.50. D. pH of the water sample is much les than 7.0. E. The pH of the water sample is 7.5.

A. What is the pH of an aqueous solution with a hydrogen ion concentration of [H*] = 8.1 x 10-5 M? pH B. What is the hydroxide ion concentration, [OH], in an aqueous solution with a hydrogen ion concentration of [H*] = 8.1 x 10-5 M? [OH-] = C. A monoprotic weak acid, HA, dissociates in water according to the reaction HA(aq) = H*(aq) + A-(aq) The equilibrium concentrations of the reactants and products are [HA] = 0.190 M, [H*] = 4.00 x 104 M, and [A-] = 4.00 x 104 M. Calculate the Ką value for the acid HA. Ka = TOOLS x10"

Hydrochloric acid is a strong acid. In a 0.01M solution, what are the pH value and the concentration of hydroxide ion? Select one: a. pH = 0.01        [OH-] = 0.01 mol dm-3 b. pH = 2             [OH-] = 10-12 mol dm-3 c. pH = 2             [OH-] = 12 mol dm-3 d. pH = 0.01        [OH-] = 12 mol dm-3

1. Calculate the pH of a soultion that has a hydrogen ion concentration of 1.25 x 10-4 2. Calculate the [H+] concentration of a soultion with a pH of 11.5    3. Write an equation to illustrate the reaction between nitric acid (HNO3) and barium hydroxide (Ba(OH)2)

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QUESTION 6 Which answer lists the chlorine containing acids in order of decreasing strength, strongest first? A. HCI > HCIO4 > HCIO3 > HCIO2 > HCIO B.HCIO4 > HCIO3 > HCIO2 > HCIO > HCI C. HCIO > HCIO2 > HCIO3 > HCIO4 = HCI D. HCI = HCIO4 > HCIO3 > HCIO2 > HCIO E.HCI > HCIO > HCIO2 > HCIO3 > HCIO4

Determine the pH of the following solutions: 1.    [H+1] = 2.3 X 10-13 M   2.    [H+1] = 7.3 X 10-3  M From the answers you obtain, answer the following questions about each solution: 1.  Determine whether each solution is an acid or base.  Explain your answer. 2.  Determine the potential products of the reaction of the solution identified as acid from above and metallic zinc. 3.  Determine what color litmus paper will turn for each solution. 4.  Determine whether each solution is a (strong acid or base) or a (weak acid or base).

Calculate the pH of each of these solutions.  is the solution acidic, basic, or neutral ?.       a.  a solution with a OH- concentration of 5.5 x 10-12 M       b.  a solution with a H3O+ concentration of 3.2 x 10-8 M       c.  a solution with a pOH of 7.00

Determine the pH of a 7.98 x 10 M Ca(OH)2 solution. Your answer should contain 3 decimal places as this corresponds to 3 significant figures when dealing with logs. PH3D