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December 7, 2016

# Search: The hydronium ion (H3O+) concentration of a 0.25 M solution of HCN (Ka = 4.9 &times; 10&amp;#8722;10) is

Number of results: 43,136

Chemistry
this makes absolutley no sense I plug all this into my calculator but I get different results. The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. [H3O+] = 10-pH or [H3O+] = antilog (- pH) Example: What...
March 23, 2007 by Jon

Chemistry
The pH of a solution is 1. Which of the following statements are also true for the solution? (Select all that apply.) It will change the color of red litmus to blue. The concentration of hydronium ion is equal to the concentration of hydroxide ion. The solution is acidic. It ...
May 18, 2012 by Cody

Chemistry Help
I have no idea where to begin with this?? This class is moving so fast! Dr. Bob222 I made a 100 on my prelab!! and the online test was so fast I was going through my notes and I was scrambling to figure it out and look up stuff on the periodic table and all!! But I made an 80...
March 3, 2015 by Jennie

chemistry
Calculate the hydronium ion concentration and pH in a 0.037 M solution of sodium formate, NaHCO2. hydronium ion concentration i don't understand these
March 6, 2013 by sara

chemistry
The pH of a 0.00100 M solution of a particular acid is 4.95 at 25°C. Use the solution pH to calculate the concentration of hydronium ion present [H3O+]
May 4, 2014 by sarah

chemistry
what are the hydronium-ion and the hydroxide ion concentration of a solution at 25 C that is 0.0050 M strontium hydroxide, Sr(OH)2? a solution of hydrochloric acid is 0.20 M HCl. What is the hydronium-ion at 25 C? What is the hydroxide ion concentration at 25 C?
August 6, 2011 by Henry

Chemistry
What are the equilibrium concentrations of all the solute species in a 0.95 M solution of hydrogen cyanide, HCN? The Ka value = 6.2 x 10^-10. (a) [H3O+], M; (b) [OH-], M; (c) [HCN], M; (d) What is the pH of the solution? For HCN So far i have calculated the concentration of ...
August 14, 2016 by Alice

Chemistry
HCN is mixed with water. Which is the best description of what you would expect to ﬁnd in the solution? 1. CN−, OH−, and water molecules 2. HCN molecules, H3O+, CN1−, and water molecules 3. H2CN+, OH−, and water molecules 4. H3O+, CN−, and ...
September 29, 2011 by Anonymous

chemistry
HCN is mixed with water. Which is the best description of what you would expect to find in the solution? 1. CN+, OH−, and water molecules 2. HCN molecules and water molecules 3. H2CN+, OH−, and water molecules 4. HCN molecules, H3O+, CN1−, and water molecules...
September 19, 2012 by cheri

chemistry
A student prepared a .10M solution of acidic acid. Acidic acid has a Ka of 1.75 x 10-3. What are the hydronium ion concentration and the PH of the solution? I think the PH is 1.76 because I hit -log(1.75 x 10-3) on my calculator and that's what I got thanks in advance for your...
March 21, 2007 by Jodi

chemistry
A solution with a pH of 2.0 has a hydronium ion concentration ten times greater than a solution with a pH of?
April 15, 2016 by Anonymous

chemistry
Calculate the hydronium ion consentration and the hydroxide concentration in blood in which the PH is 7.3. Hydronium = [H3O+] = 10-pH or [H3O+] = antilog (- pH) and I got 1.00 x 10^7.3 for both concentrations is this correct? ABsolutely silly. You did not do the math. PUt this...
March 23, 2007 by Jon

chemistry
Benzoic acid reacts with water to form the benzoate ion by the following reaction C6H5COOH(aq) + H2O(l) ⇀↽ C6H5COO−(aq) + H3O +(aq) The equilibrium constant for this reaction is 6.4 x 10−5 . In a 0.1 M solution of benzoic acid, what is the concentration...
February 7, 2015 by Anonymous

Analytical Chemistry
The question: The pH of a solution is defined as pH = -log[H3O+]. If the pH of a solution is 3.72(+/- 0.03), what is the [H3O+] and its absolute standard deviation? Answer: How would I carry this out? I know to find the hydronium concentration wouldn't i just take e^3.72? How ...
January 28, 2013 by James

Chemistry
A 0.10 M solution of a weak monoprotic acid has a hydronium-ion concentration of 5.0 ´ 10-4 M. What is the equilibrium constant, Ka, for this acid? a. 5.0 ´ 10-2 b. 5.0 ´ 10-3 c. 2.5 ´ 10-4 d. 2.5 ´ 10-5 e. 2.5 ´ 10-6 2. (Points: 1) What is the carbonate-ion, CO3-2, ...
May 13, 2010 by write2khin

Chem Help
If the hydronium ion concentration of a aqueous solution at 25 degrees celcius is 5*10^-6 M, what is the hydroxide ion concentration
July 1, 2011 by Danielle

chemistry
1.Does a pH of 8.6 describe a solution with a higher or lower hydronium ion concentration compared to a neutral solution? Is such as solution called acidic or basic? 2. Compared to a neutral solution, would you expect an acidic solution to have a higher or lower pH and a ...
May 2, 2013 by alex

Chemistry
The hydronium ion concentration for a solution is determined to be 4.5 x 10^-7 M. What is the concentration of the hydroxide ion? I just wanted to let the people that are being nice enough to help me know that this is for a study guide. It is not a test or quiz. :0) Thanks.
November 25, 2012 by Amber

Chemistry
An aqueous solution that 2.00 M in AgNO3 is slowly added from a buret to an aqueous solution that is 1.00×10−2 M in Cl− and 0.260 M in I−. When the second ion begins to precipitate, what is the remaining concentration of the first ion? I know that the first ...
June 5, 2016 by Sydney

Chemistry
0.10 M solution of a weak monoprotic acid has a hydronium-ion concentration of 5.0 * 10^-4 M. What is the equilibrium constant, Ka, for this acid? a. 5.0 *10^-2 b. 5.0 * 10^-3 c. 2.5 * 10^-4 d. 2.5 * 10^-5 e. 2.5 * 10^-6 2. (Points: 1) What is the carbonate-ion, CO3^-2, ...
May 13, 2010 by wite2khin

Chemistry
Determine the hydronium ion concentration in a solution that is 0.00027 M HCl. Answer in units of M. Determine the hydroxide ion concentration in a solution that is 0.00027 M HCl. Answer in units of M. This is a two part question and I have tried multiple times and every time ...
April 14, 2015 by Radio Active Wear

chemistry
15029 What is the hydronium ion (aka H+) concentration for a solution that is 2.50 x 10-4M in hydroxide. what do i do here? The product of hydroxide and hydronium is a constant, at 25C, it is 1*10^-7
May 1, 2007 by sam

chemistry
pH = 3.89 calculate concentration of hydronium ion and hydroxide ion in solution.
July 26, 2013 by shana

Gen cmehistry
Calculate the hydroxide ion concentration in an aqueous solution that contains 3.50 x 10-3 M in hydronium ion.
April 21, 2010 by asasas

Chemistry
6.00 g of NaOH are dissolved in water to make 4.00 L of solution. What is the concentration of hydronium ions, [H3O+], in this solution?
July 25, 2015 by Serge

Chemistry
A solution has a hydroxide-ion concentration of 7.48X10-5 M. What is it's hydronium-ion centration? I have no idea where to begin on this question...
February 18, 2013 by Robby

Chemistry
Show that the hydroxide-ion concentration in an aqueous solution is 1x10-4 M when the hydronium-ion concentration is 1x10-10 M.
May 10, 2011 by Cami

Chemistry help
2.00g of NaOH are dissolved in water to make 2.00L of solution. What is the concentration of hydronium ions, [H3O+], in this solution?
July 29, 2013 by Anonymous

Chemistry Acid/bases
The concentration of H2SO4 in a solution is 3.20 10-6 M. Assume the acid dissociates completely in solution. What is the [H3O+] in the solution? What is the [OH-] in the solution? What is the pH of the solution? What is the pOH of the solution? OK SO I KNOW HOW TO DO THESE ...
February 10, 2009 by Spencer

Chemistry
The approximate concentration of a hydrochloric acid solution is 0.5M. The exact concentration of this solution is to be determined by the titration with 0.5M solution of sodium hydroxide. A 10.00 ml of HCl solution was transferred by pipet to an Erlenmeyer flask. What is the ...
May 17, 2015 by Ericka

chemistry
8.00g of NaOH are dissolved in water to make 4.00L of solution. What is the concentration of hydronium ions, [H3O+], in this solution? Express your answer with the appropriate units.
November 7, 2014 by Anonymous

chemistery
in a solution of pH of 3.26, the molar concentration of the hydronium ion is ?
December 9, 2012 by ogb

chemistry
The concentrated H2SO4 of 155g dissolved in enough amount of water if acidic solution is 2.3L a) what is the mole of H2SO4 b) what is the concentration H2SO4 c) what is the concentration of H+(H3O+) created in the solution d) what is the PH value of solution e) what is the ...
January 12, 2015 by Anonymous

Chemistry
What is the pH of a solution that has a concentration of hydronium ions that is 4.7 × 10-4 molar H3O+? Show, or explain, the work used to solve this problem.
June 13, 2011 by Johnny

Chemistry
What is the pH of a solution that has a concentration of hydronium ions that is 1.8 × 10-4 molar H3O+? Show, or explain, the work used to solve this problem.
April 15, 2014 by Shanetra

Chemistry
Estimate the equilibrium constant for the weak acid HCN, if a 4.68×10-3 M aqueous solution of HCN has a [H+] 0.00000151 M (make an exact calculation assuming that initial concentration is not equal to the equilibrium concentration). HCN = CN- + H+
April 17, 2013 by Anna

Chemistry
My final exam is coming up so I am doing study guides to help me practice. I would really appreciate any help that is given. 1. The hydronium ion concentration for a solution is determined to be 4.5 x 10^-7 M. What is the concentration of the hydroxide ion? 2. When a 5.00 mL ...
November 25, 2012 by Studying

Chemistry
Calculate the concentration of the hydronium ion([H3Ol+]) for a solution with the pH = 4.5
March 25, 2012 by Lisa

Chemistry
Show that the pH of a solution is -0.301 when its hydronium-ion concentration equals 2 M. Is the solution acidic or basic?
May 10, 2011 by Rachael

chemistry
calculate the hydronium ion concentration in an aqueous solution that contains 2.50x10^-6M in hydroxide solution
December 1, 2011 by brittney

Chemistry
what is the hydronium ion concentration in a 0.55 M HNO3 solution ? what is the pH of this solution? Thank You!!!
May 1, 2013 by David

Chemistry
what is the hydronium ion concentration in a 0.55 M HNO3 solution ? what is the pH of this solution? Thank You!!!
May 1, 2013 by David

AP Chemistry
A given weak acid HZ has a Ka=1.7×10−6. What is the H3O+ concentration of a solution of HZ that has a concentration of 0.78 mol/L? What is the pH of this solution of HZ? What is the percent ionization of HZ in this solution? Answer in units of %
January 24, 2014 by Gabriella

chemistry
The chemical reaction for dissociation of an acid is: HA + H2O → H3O+ + A- Assuming all of the hydronium ion (calculated in in the previous problem) comes from this reaction, what is the concentration of conjugate base, [A-], in this system?
May 4, 2014 by sarah

Chemistry
Silver ion reacts with excess CN− to form a colorless complex ion, Ag(CN)−2, which has a formation constant Kf=3.0×1020. Calculate the concentration of Ag+ in a solution prepared by mixing equal volumes of 2.3×10−3M AgNO3 and 0.21M NaCN.
March 27, 2014 by Emily

Chemistry help please
What is the pH of a solution whose hydronium ion concentration is 0.0010 M?
March 26, 2012 by Mary

Chemistry help please
What is the pH of a solution whose hydronium ion concentration is 0.0010 M?
March 26, 2012 by Mary

Chemistry I
Determine the hydronium ion concentration in a solution that is 0.00018 M Ca(OH)2. Answer in units of M
March 11, 2013 by Ashleigh

Chem
what is the hydronium-ion concentration at equilibrium in a 0.71 M solution of aniline (Kb=4.2x10^-10) at 25 Celsius
March 19, 2013 by Che

chemistry exercises
The concentrated H2SO4 of 155g dissolved in enough amount of water if acidic solution is 2.3L a) what is the mole of H2SO4 b) what is the concentration H2SO4 c) what is the concentration of H+(H3O+) created in the solution d) what is the PH value of solution e) what is the ...
January 12, 2015 by Anonymous

CHEM
A concentrated weak acid is best described as which of the following? (a) a solution with a high pH (b) a solution where the concentration of undissociated acid particles is high and relative quantity of hydronium ions is low (c) a solution where the concentration of ...
July 24, 2009 by Lena

chemistry
The hydrogen-ion concentration of a 0.25 M solution of HCN (Ka = 4.9 ´ 10-10) is I keep getting 1.1 *10^-5
June 20, 2010 by Mohamad

Chemistry
What is the hydronium ion concentration in a solution 0.150M in HNO2 and 0.300M in NaNO2? Ka = 7.24E-4
April 14, 2013 by Alexis

chemistry
Please judge my answer, thank you Question: What is the pH of a 1.24 mol/L solution of HCN(aq) if its Ka = 6.2 x 10-10? Answer: It is imperative to initially set up ionization. THen, it becomes important to write the Ka expression, after which setting up an ICE table becomes ...
April 15, 2008 by Abigail

Chemisty
Which solution contains more acid, 50ml of a 0.20 N HCL solution or 50 ml of a 0.20 N acetic acid solution? Which has a higher hydronium ion concentration? Which has a lower pH?
November 21, 2010 by Terry

science
You add 12.5 mL of 4.15 acetic acid to 25.0 mL of 1.00 M NaOH. Calculate the hydronium ion concentration and pH of the resulting solution.
March 7, 2011 by Bill

chemistry
oxalic acid, h2c2o4, is a weak acid capable of providing two H3O+ ions. ka=.059 k2=6.4E-5 the [h3o]+ in a .38 M solution of h2c2o4 is .12M and can be calculated by the first ionization step only. what is the equilibrium concentration of the oxalate ion c2o4^-2, in the .38 M ...
December 4, 2010 by anonymous

Chemistry
1)How many joules are needed to heat 8.50 grams of ice from -10.0 degrees to 25.0 degrees? 2)Calculate the hydronium ion concentration and the hydroxide ion concentration in blood, the pH of which is 7.3(slightly alkaline)
January 17, 2008 by Mike

Chemistry
What is the hydroxide ion concentration in a solution with [H3O-] = 7.67 x 10^-9M
March 11, 2010 by Anonymous

Chem
Methylaime, CH3NH2. If a 0.100 mol/L solution of methyamine has a pH of 11.80, calculate the ionization constant for the weak base. What is an ionization constant. Is it just K? This is what I did so far: 11.80 = -log (concentration of h3o+) 10^-11.80 = (concentration of h3o...
July 23, 2009 by Lena

Chemistry
Calculate the pH of a 0.18 M solution of cyanide ion, CN- given the Ka (HCN) = 6.2 x 10^-10. I know how to calculate Ka and Kb values no problem, but I don't know which value to use in my calculations. Is it based on the conjugate base/acid formed or hydronium or hydroxide ...
December 2, 2015 by Tim

Chemistry
the hydronium ion concentration of a 0.050 M solution of a weak acid is 5.9 X 10^-3 M. the acid-dissociation constant is 1.37 X 10^-4 at 25 celsius. what is the pH of this solution? A. 0.077 B. 1.30 C. 2.23 D. 3.86 E. 5.13
March 18, 2013 by Chemistry

chemistry
Calculate the pH of a 5.75×10-2 M solution of the weak acid HCN (make an approximate calculation assuming that initial concentration is equal to the equilibrium concentration). Round your answer to 3 significant digits. HCN = CN- + H+
October 10, 2013 by HELP ASAP PLEASE

Chemistry
what is the hydronium-ion concentration in a 0.35m solution of NaCO3? For carbonic acid, Ka1=4.2x10^-7 and Ka2=4.8x10^-11. (Kw=1.0x10^-14)
March 22, 2013 by Sara

10th grade Chemistry
What is the hydroxide ion concentration in a solution with [H3O+] = 7.67*10^-9 M?
December 8, 2010 by gab

chemistry
A 0.942 M sample of carbonic acid, H2CO3, has a measured hydronium ion concentration of 6.36 ´ 10–4 M. Calculate the acid-ionization constant of carbonic acid. The equilibrium equation is: H2CO3(aq) + H2O(l) <--><--> H3O+(aq) + HCO-3(aq)
August 9, 2010 by Lily

chem 2
indictae the reactant that is a bronsted lowry acid. HCN(aq) +H2O (l)---> H3O+(aq)=CN-(aq) HCN CN- H20 H30 i think it is HCN the weak acid substance which acts as a proton (H+) donor and CN the weak base? You are right. The HCN donates the proton (to H2O) so that makes HCN...
April 30, 2007 by jane

chemistry
The H3o+ concentration of a solution is found to e 3.40*10^-6. What is the pH of the solution? what is the H3O+ concentration? what is the OH- concentration? is this and acidor a base?
June 6, 2013 by Miranda

Chemistry
If aqueous hydrofluoric acid is reacted with sodium hydroxide, which of the following substances are in the net ionic equation? 1. fluoride ion, hydronium ion, and water 2. fluoride ion, hydroxide ion, hydronium ion, and water 3. hydrofluoric acid, sodium ion, hydroxide ion, ...
October 16, 2010 by Elva

Chemistry
What is the hydronium ion concentration of a buffer solution that is 0.10M NaHPO4 and 0.50M NaH2PO4? For H3PO4,Ka1=6.9x10^-3, Ka2=6.2x10^-8, Ka3=4.8x10^-13
March 22, 2013 by Viv

Chemistry
Calculate the concentration of OH− and the pH value of an aqueous solution in which [H3O+ ] is 0.014 M at 25°C. Is this solution acidic, basic or neutral?
March 12, 2015 by Jennie

Chemistry
An aqueous solution that 2.10 M in AgNO3 is slowly added from a buret to an aqueous solution that is 1.20×10^−2 M in Cl- and 0.260 M in I- . When the second ion begins to precipitate, what is the remaining concentration of the first ion?
March 16, 2012 by Ryan

Honors Chemistry
1. What is the pH of a solution whose [H3O+] is 1 X 10^ -5 M? 2. What is the [H3O+] concentration of a solution with a pH of 9? 3. What is the pH of a solution whose [H3O+] concentration is 3 X 10^-3 M? 4. What is the pH of a solution with a [H3O+] concentration of 1 X 10^ -12...
April 6, 2012 by Chris

Honors Chemistry
1. What is the pH of a solution whose [H3O+] is 1 X 10^ -5 M? 2. What is the [H3O+] concentration of a solution with a pH of 9? 3. What is the pH of a solution whose [H3O+] concentration is 3 X 10^-3 M? 4. What is the pH of a solution with a [H3O+] concentration of 1 X 10^ -12...
April 19, 2012 by Kelly

--- Chemistry ---
What is the most common chemical method for removing H_30^+ ions in aqueous solution? Write a net ionic equation which describes this method. Add a base. What happens to the H concentration when the OH concentration goes up? We havn't started Acids/Bases yet in class, in fact...
December 3, 2006 by J.M

chemistry
1. Find the pH of a solution whose [H3O+] is 9.5 X 10^ -8 M. 2. What is the [H3O+] concentration of a solution with a pH of 5.45? 3. What is the pOH of a solution with a [OH -] concentration of 2.97 X 10^ -10 M?
May 14, 2012 by kellin

Algebra
Use the formula pH = −log[H^+] 9.. The hydrogen ion concentration of a substance is 4.3*10^-6 × moles per liter.Find the pH. Round to the nearest tenth. 10. Find the hydrogen ion concentration of a solution whose pH is 5.3.
December 10, 2015 by john

science
A student prepared a .10M solution of acidic acid. Acidic acid has a Ka of 1.75 x 10-3. What are the hydronium ion concentration and the PH of the solution? I think the PH is 1.76 because I hit -log(1.75 x 10-3) on my calculator and that's what I got thanks in advance for your...
March 21, 2007 by Jodi

chemistry
Calculate the molar concentration of OH− ions in an 1.79 M solution of hypobromite ion (BrO−; Kb = 4.0 10-6).
March 4, 2013 by sara

chemistry
what is the hydronium ion concentration of a 0.35M oxalic acid, H2C2O4. solution? for oxalic acid, ka1= 5.6x10^-2 and ka2=5.1x10^-5. Identify and calculate the concentrations for the representative species in solution.
April 22, 2014 by Anonymous

Chemistry
What is the H+ ion concentration of this solution? A solution is made by dissolving 0.0112 g KOH in enough water to make 1.0 liter of solution. What is the H+ ion concentration of this solution? a. ) 2.0 x 10-3 M b. ) 8.0 x 10-2 M c. ) 1.2 x 10-13 M d. ) 5.0 x 10-11 M e. ) 5.0...
November 3, 2008 by Angelo09

Chemistry
What is the only positive ion found in H2SO4(aq)? a. ammonium ion b. hydronium ion c. hydroxide ion d. sulfate ion The answer's b, but I don't understand why.
November 20, 2010 by danny123

chem
What relationship exists between H^+ ion concentration and OH^- ion concentration? Waht is the OH^- concentration of an aqueous solution with the H^+ concentration of 10^-4M. Calculate the pOH? Need help with this pls. thank you.
November 28, 2012 by chemdummy

Chemistry
A solution with pH = 4 has 1. relatively high concentration of OH- 2. relatively low concentration of H3O+ 3. relatively high concentration of H3O+ 4. zero concentration of OH- Some of the answers people are giving me are confusing. I just need to know if it 1,2,3 or 4?
October 22, 2011 by nan

Chemistry 20
Each of the following solutions has a concentration of 0.1 mol/L. Compare the hydronium-ion concentration and pH in each pair, and explain why they are different. a) H2SO4(aq) vs. H2SO3(aq) b) H2S(aq) vs. NH3(aq)
November 23, 2010 by Anonymous

Chem 20
Each of the following solutions has a concentration of 0.1 mol/L. Compare the hydronium ion concentration and pH in each pair and explain why they are different. a) H2SO4(aq) vs. H2SO3(aq) b) H2S(aq) vs. NH3(aq)
December 10, 2010 by Anonymous

CHEIMISTRY
A buffer solution is 0.20 M in HPO42- ions and 0.l0 M in H2PO4- ions. What is the H3O+ ion concentration of the solution? The ionization constants for H3PO4 are as follows: Ka1 = 7.5 ´ 10 -3, Ka2 = 6.2 ´ 10-8, Ka3 = 1 ´ 10-12. a. 3.7 ´ 10-3 M b. 3.7 ´ 10-4 M c. 3.1 ´ 10-...
May 30, 2010 by james

chemisrty
Rank following acids frommost to least acidic: hydrocyanic acid (HCN) Ka = 6.2 × 10−10 hypoiodous acid (HOI) Ka = 2 × 10−11 chlorous acid (HClO2) Ka = 1.2 × 10−2 acetic acid (CH3COOH) Ka = 1.8 × 10−5 1. HOI > HClO2 > CH3COOH > HCN 2. ...
June 8, 2014 by susan

ap
If aqueous hydrofluoric acid is reacted with sodium hydroxide, which of the following sub- stances are in the net ionic equation? 1. fluoride ion, hydronium ion, and water 2. hydrofluoric acid, sodium ion, hydroxide ion, and fluoride ion 3. hydrofluoric acid, hydroxide ion, ...
October 1, 2012 by cheri

chemistry (acid-ionization constant)
A 0.942 M sample of carbonic acid, H2CO3, has a measured hydronium ion concentration of 6.36 ´ 10–4 M. Calculate the acid-ionization constant of carbonic acid. The equilibrium equation is: H2CO3(aq) + H2O(l) <--><--> H3O+(aq) + HCO-3(aq)
August 9, 2010 by Lily

Chemistry
A student prepared a 0.10 M solutino of acetic acid, CH3COOH. Acetic acid has a Ka of 1.75 x 10^-5. What are the hydronium ion concentration and the pH of the solution?
January 18, 2008 by Sue

Chemistry
What is the hydronium ion concentration in a 0.010M solution of carbonic acid, H2CO3? For carbonic acid, Ka1=4.2x10^-7 and Ka2=4.8x10^-11.
March 19, 2013 by C

CHEMISTRY
Thiosulfate ion S2O32− is oxidized by ioidine according to the following reaction. 2S2O32−(aq) + I2(aq) ¨ S4O62−(aq) + 2I−(aq). If in a certain experiment, 0.0020mole of thiosulfate ion is consumed in 1.0 L of solution in 1 second, what is the rate ...
April 22, 2014 by Juan Pablesteban Gonzalez

Chemistry
If a solution of Ca(OH)2 has a pH of 12.31 how can I calculate the concentration of calcium hydroxide in mol L-1 ? Write the dissociation equation: Ca(OH)2 >>Ca+ + 2OH So the concentration of the OH ion is twice the Ca(OH)2 . Find the concentration of the OH ion [H+]= ...
May 21, 2007 by Fiona

chemistry 2
A saturated solution of Mg(OH)2 has a pH of 10.52. What is the Hydronium concentration? Whats the hydroxide concentration? Is this solution acidic,or basic?
April 18, 2008 by ron

Gen chemistry
What is the hydronium ion concentration of an acid rain sample that has a pH of 3.45?
April 20, 2010 by asasa

chemistry
The term “Ka for the ammonium ion” describes the equilibrium constant for which of the following reactions? 1. NH3 + H2O ⇀↽ NH4 + + OH− 2. NH+ 4 + OH− ⇀↽ NH3 + H2O 3. NH3 + H3O + ⇀↽ NH+ 4 + H2O 4. NH+ 4 + H2O ⇀↽ ...
February 7, 2015 by Anonymous

Chem
Please tell me if these are right! What are the [H3O+] and [OH-] for a solution with the following pH values? a. 10.0 I got 1.0*10^-10 for [H3O+] and 1.0*10^-4 for [OH-] b. 5.0 I got 1.0*10^-5 for [H3O+] and 1.0*10^-9 for [OH-] c. 7.00 I got 1.0*10^-7 for [H3O+] and1.0*10^-7 ...
December 8, 2010 by Jessica

Chemistry
Calculate the end point pH, when 25 mL of 0.01 mol/L HCl solution reacts exactly with 25 mL of 0.1 mol/L NH4OH solution. NH3 Kb = 1.8 x 10^-5 This will be the pH of NH4Cl solution. NH4+ + HOH ==> NH3 + H3O^+ Ka = Kw/Kb = (NH3)(H3O^+)/(NH4^+). Solve for H3O^+, then pH = - ...
May 31, 2007 by Raj

Survey of the sciences
When the hydronium ion comcentration of a solution equals 1 mole per liter, what is the pH of the solution? Is the solution acidic or basic?
February 9, 2011 by Stephanie

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