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pH and pOH Solutions Library

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162 solutions

pH and pOH

Q. At 25 C, how many dissociated OH ions are there in 1219 mL of an aqueous solution whose pH is 1.56? 

Solved • May 21, 2018

pH and pOH

Q.  Calculate the poH of a 0.0321 M HCIO4 solution at the following temperatures

Solved • May 4, 2018

pH and pOH

Q. 1. Three solutions have the following pH:      pH = 4.3      pH = 6.8      pH = 11.5      a) Which solution contains the highest H3O+ ion concentra...

Solved • May 4, 2018

pH and pOH

Q. What are the concentrations of hydrogen ion and hydroxide ion in household ammonia, an aqueous solution of NH3 that has a pH of 12.3?

Solved • May 1, 2018

pH and pOH

Q. 0.90 g of sodium hydroxide (NaOH) pellets are dissolved in water to this solution? Express the pH numerically to two decimal places. pH = 11.75 Wha...

Solved • Apr 29, 2018

pH and pOH

Q. (a) What is the pH of 3.7 times 10^-3 M HCI? (b) What is the pH of 8 times 10^-8 M HCI?

Solved • Apr 19, 2018

pH and pOH

Q. An aqueous solution at 25°C has a H3O+ concentration of 0.0076 M. Calculate the OH- concentration. Be sure your answer has the correct number of si...

Solved • Apr 18, 2018

pH and pOH

Q. Calculate [H3O+] for the following solutions:a) 6.00 x 10-3 M HBrb) 1.80 x10-2 M KOH

Solved • Apr 7, 2018

pH and pOH

Q. Calculate the [H3O+] and pH of each of the following H 2SO4 solutions.a) Calculate the [H3O+] for 0.10 M solution. Express your answer using two si...

Solved • Apr 6, 2018

pH and pOH

Q. Calculate the [OH-] of peas with the [H3O+] = 5.5 times 10-7 M

Solved • Apr 4, 2018

pH and pOH

Q. Which statement correctly describes a solution with a pH of 9? a. It has a higher concentration of H 3O+ than OH - and causes litmus to turn blue. ...

Solved • Mar 28, 2018

pH and pOH

Q. For the strong acid solution, determine [H 3O+], [OH-], and pH: 0.26M HCl 

Solved • Mar 26, 2018

pH and pOH

Q. Which solution below has the highest concentration of hydroxide ions?a. pH= 3.21b. pH= 7.00c. pH= 7.93d. pH= 12.59e. pH= 9.82

Solved • Mar 23, 2018

pH and pOH

Q. The lower the pH number, the higher is the hydrogen ion concentration.a. Trueb. False 

Solved • Mar 23, 2018

pH and pOH

Q. Which is the pH of a solution with a [H  3O+] of 1 × 10 -9 M?a. -9.0b. 5.0c. -5.0d. 9.0e. None of the above 

Solved • Mar 23, 2018

pH and pOH

Q. Which of the following solutions is basic?i. [H3O+] = 2 x 10 -8 Mii. [OH-] = 2 x 10 -6 Miii. [H3O+] = 9 x 10 -6 Ma. i , ii, and iiib. iiic. iid. i ...

Solved • Mar 22, 2018

pH and pOH

Q. The pH values of five solutions are given below. Which is the most alkaline?a. pH = 4.5b. pH = 13.0c. pH = 0.0d. pH = 1.0e. pH = 7.0

Solved • Mar 22, 2018

pH and pOH

Q. Which answer is a true statement about pH values?a. A high pH value corresponds to a high H + concentration.b. Stomach acid has a high pH value.c. ...

Solved • Mar 22, 2018

pH and pOH

Q. What is the pH of pure water at 40C if the kw at this temperature is 2.92x10-14?

Solved • Mar 22, 2018

pH and pOH

Q. Calculate [H3O+] and [OH−] for each of the following solutions.a. pH = 8.57 b. pH = 2.86

Solved • Mar 20, 2018

pH and pOH

Q. Complete the following table. All solutions are at 25°C. (Up to two significant figures)  

Solved • Mar 20, 2018

pH and pOH

Q. For each of the following strong base solutions, determine [OH−],[H3O+], pH, and pOH.Express your answer using three significant figures. 8.74 × 10...

Solved • Mar 16, 2018

pH and pOH

Q. Arrange the following aqueous solutions, all at 25°C in order of decreasing acidity.a. pOH = 8.05b. 0.0023M HClc. pH= 5.45d. 0.0018M KOH

Solved • Mar 6, 2018

pH and pOH

Q. In an acidic solution, how does the concentration of hydronium ions compare to the concentration of hydroxide ions?a) Hydronium ion is greater than...

Solved • Feb 20, 2018

pH and pOH

Q. Calculate the concentrations of H 3O+ and OH− in each of the following solutions:i) Human blood (pH 7.40)ii) A cola beverage (pH 2.8)

Solved • Feb 16, 2018

pH and pOH

Q. What is the pH of an aqueous solution with the hydronium ion concentration [H  3O+] = 2 x 10 -14 M ?

Solved • Feb 16, 2018

pH and pOH

Q. Which of these statements are true for a neutral, aqueous solution at 25 degree C? More than one can be correct. a. pH = 7.00b. pOH = 7.00c. [H+] =...

Solved • Jan 4, 2018

pH and pOH

Q. Why is the pH of distilled water usually less than 7?

Solved • Dec 19, 2017

pH and pOH

Q. Complete this table of values for four aqueous solutions at 25°c 

Solved • Sep 22, 2017

pH and pOH

Q. Normal rainwater does not have a pH of 7.0. What is the reason?a) CaO combines with H2O to form an acidb) CO2 combines with H2O to form a hydroxide...

Solved • Aug 25, 2017

pH and pOH

Q. What is the hydronium ion concentration of an acid rain sample that has a pH of 3.45? A) 2.82 × 10-11 M B) 3.55 × 10-4 M C) 3.45 M D) 10.55 M

Solved • Jun 16, 2017

pH and pOH

Q. Calculate the hydroxide ion concentration in an aqueous solution with a pH of 9.85 at 25°C. A) 7.1 × 10-5 M B) 4.2 × 10-10 M C) 8.7 × 10-10 M D...

Solved • Jun 16, 2017

pH and pOH

Q. What is the concentration of hydroxide ions in pure water at 30.0°C, if K w at this temperature is 1.47 × 10-14? A) 1.00 × 10-7 M B) 1.30 × 10-7 ...

Solved • Jun 16, 2017

pH and pOH

Q. A beaker contains a solution with [H3O+] = 2.59 x 10 -2 M at 25°C. Which of the following statement(s) is/are correct about this solution?i. The [O...

Solved • Apr 28, 2017

pH and pOH

Q. Calculate the [H3O+] of a solution that has a pOH = 4.1.A. 1.3 x 10-10 MB. 9.9 MC. 7.9 x 109 MD. 2.4 x 10-15 ME. 4.1 x 10-11 M

Solved • Apr 28, 2017

pH and pOH

Q. At body temperature of 37.0°C, K w = 2.5 x 10-14. Calculate the [H3O+] if the [OH -] = 3.9 x 10-3 M.A. 2.5 x 10-12 MB. 6.4 x 10-12 MC. 3.9 x 10-3 M...

Solved • Apr 28, 2017

pH and pOH

Q. What is the [H3O+] for a solution at 25°C that has pOH = 5.640? A) 2.34 x 10-4 M B) 2.29 x 10-6 M C) 4.37 x 10-9 M D) 4.27 x 10-11 M E) 8.360 M

Solved • Mar 23, 2017

pH and pOH

Q. What is the [OH–] for a solution at 25 °C that has [H3O+] = 2.35 × 10–3 M?A) 4.26 × 10–5 MB) 2.35 × 10–11 MC) 4.26 × 10–12 MD) 2.35 × 10–17 ME) Non...

Solved • Mar 22, 2017

pH and pOH

Q. pOH = 3.14 is equivalent to:       A) [OH −] = 3.14 × 10 −7 M B) pH = 11. C) [H +] = 1.4 × 10 −10 M D) [OH −] = 7.2 × 10 −4 M E) [H +] = 7.0 ×...

Solved • Mar 22, 2017

pH and pOH

Q. What is the concentration (in M) of hydroxide ions (OH −) in a solution at 25.0 °C with pH = 4.282?      A) 9.72 B) 1.66 × 10 4 C) 1.91 × 10 −10...

Solved • Mar 22, 2017

pH and pOH

Q. What is the [OH -] for a solution at 25°C that has [H 3O+ ] = 8.23 x 10 -2 M? A) ˃10-5 M B) 1.22 x 10-6 M C) 8.23 x 10-12 M D) 1.21 x 10-13 M ...

Solved • Mar 22, 2017

pH and pOH

Q. Complete the following statement. A pH value of −1.51. indicates an H+ concentration of 31.6 M.2. is impossible because pH cannot be negative.3. in...

Solved • Mar 10, 2017

pH and pOH

Q. Of the following, a solution with which pH would have the greatest concentration of hydronium ions?1. 8 2. 93. 104. 12

Solved • Mar 10, 2017

pH and pOH

Q. A solution with pH of 2 has twice the [H+] as as solution of pH 4. a. True b. False

Solved • Jan 27, 2017

pH and pOH

Q. Calculate the pH of a solution at 25°C in which the [OH−] = 5.4 x10  −7 M.A) 4.51B) 7.05C) 7.73D) 6.38E) 8.40

Solved • Oct 17, 2016

pH and pOH

Q. Calculate the pH of water at 40 oC, given that Kw is 3.8 x 10 -14 at this temperature. 

Solved • Sep 22, 2016

pH and pOH

Q. What is the hydroxide ion and hydronium ion concentration of an aqueous solution that has a pOH equal to 6.29?

Solved • Sep 22, 2016

pH and pOH

Q. What is the hydronium ion concentration in a solution having a pOH of 3.62? 1. 3.8 × 10−5 M 2. 4.2 × 10−11 M 3. 3.8 × 10−4 M 4. 2.6 × 10−11 M ...

Solved • Sep 21, 2016

pH and pOH

Q. Calculate the pOH of a solution that contains 3.9 x 10 -4 M H3O+ at 25°C. A) 4.59 B) 3.31 C) 10.59 D) 9.14 E) 0.59

Solved • Aug 27, 2016

pH and pOH

Q. What is the [H3O+] for a solution at 25°C that has pOH = 5.640? A) 2.34 x 10-4 M B) 2.29 x 10-6 M C) 4.37 x 10-9 M D) 4.27 x 10-11 M E) 8.360 M

Solved • Aug 25, 2016

pH and pOH

Q. If the concentration of hydronium ion, [H3O+] = 8.62 x 10 -4, what is the pH of the solution? a. 10.936 b. 0.998 c. 3.064 d.1.6 x 10-11 e. 2.329

Solved • Aug 24, 2016

pH and pOH

Q. For a solution with an [OH −] of 10−8 M, what would be the value of [H +] , pH and pOH, respectively? 1. 10−14 M, 6, 8 2. 10−6 M, 6, 8 3. 10−6 M...

Solved • Aug 1, 2016

pH and pOH

Q. At 0°C the ion product constant of water,  Kw, is 1.2 x 10–15. The pH of pure water at this temperature is(A) 6.88(B) 7.00(C) 7.46(D) 7.56

Solved • Apr 26, 2016

pH and pOH

Q. In water, the equilibrium 2H2O(l) ⇌ H3O+ (aq) + OH−(aq)      Kc = 10−14 determines the concentrations of H3O+(aq) and OH -(aq). If the pH is 9.2,...

Solved • Apr 12, 2016

pH and pOH

Q. The pH of gastric juice inside the stomach is 1.5. What is [OH −]? Kw = 2.8 x10 -14 at body temperature (37 °C).

Solved • Mar 31, 2016

pH and pOH

Q. Calculate the hydroxide ion concentration in an aqueous solution with a pH of 4.33 at 25°C. A) 2.1 × 10-10 M B) 9.7 × 10-10 M C) 4.7 × 10-5 M D...

Solved • Feb 24, 2016

pH and pOH

Q. What is the hydroxide ion and hydronium ion concentration of an aqueous solution that has a pH equal to 6.12?

Solved • Feb 21, 2016

pH and pOH

Q. For a solution that has a pH of 2.00, what is the concentration of OH– ions?A. none presentB. 0.0100C. 1.00 x 10−7 D. 1.00 x 10−12E. 1.00 x 10−16

Solved • Feb 21, 2016

pH and pOH

Q. Which solution that has a pH of 2.00, what is the concentration of OH – ions?a. none presentb.0.0100c. 1.00 * 10–7d. 1.00 * 10–12e. 1.00 * 10–19

Solved • Feb 2, 2016

pH and pOH

Q. If additional OH- is added to a sample of pure water, which of the following statements is incorrect?   a. The equilibrium position shifts to the...

Solved • Feb 2, 2016

pH and pOH

Q. What is the hydroxide concentration in a solution with a pH of 6.34?   A. 2.19x10-6 B. 2.19x10-8 C. 3.45x10-4 D. 3.45x10-6 E. 6.26x10-8

Solved • Feb 2, 2016

pH and pOH

Q. At 0 degrees Celsius, the ion product constant of water is 1.2x10-15. The pH of pure water at this temperature is:   A. 6.88 B. 7.00 C. 7.46 D...

Solved • Feb 2, 2016