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June 30, 2016

Search: Calculate the pH of a 0.21 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5.

Number of results: 59,970

chemistry
A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].
January 20, 2011 by jaycab

Chemistry
Calculate the pH of a 0.250M solution of Sulfurous acid, H2SO3.
February 18, 2011 by Josh

chemistry
Calculate .200 mol sodium phosphate in 10.0 ml of solution
March 4, 2011 by Anonymous

chemistry
Calculate the molarity of each of the following solutions. 1. 61.9 g of C2H6O in 3.4 L of solution
March 9, 2011 by Abby

Chemistry
Calculate the concentrations of H3O+ and OH- ions in a 0.25 M HClO4 solution.
March 10, 2011 by John

chemistry
Calculate the pH after 0.15 mol of NaOH is added to 1.00 L of the solution that is 0.50 M HF and 1.01 M KF
March 25, 2011 by kyle

chemistry
20 g of sugar are dissolved in 1 L of water. Calculate the concentration of this solution.
August 28, 2011 by Sarah

chemistry
Calculate the osmotic pressure of a 6.0 10-2 M solution of NaCl at 20C (293 K).
October 29, 2011 by Chemistry Chick

Chemistry
A solution is prepared by diluting concentration HNO3 to 2.0 M,Calculate PH.
November 23, 2011 by Ethio

chemistry
Calculate the pH of a solution obtained by mixing 30 mL of 0.75 M CH3COOH with 15 mL of 1.5 M NaOH.
January 24, 2012 by grewal

chemistry
Calculate the molarity of 2.05 L of a solution containing 1.51 g of dissolved KBr
February 9, 2012 by jessica

AP CHEMISTRY
If a solution of HF (Ka = 6.8 10-4) has a pH of 3.42, calculate the total concentration of hydrofluoric acid.
February 14, 2012 by Stanley3000

AP CHEMISTRY
If a solution of HF (Ka = 6.8*10-4) has a pH of 3.42, calculate the total concentration of hydrofluoric acid.
February 16, 2012 by MARY

Chemistry
5.70 g of NH4Cl is added to 13.3 g of water. Calculate the molality of the solution.
February 16, 2012 by Heather

chemistry
Calculate the pH of a 0.87 M NaCN solution. Solve it exactly (no assume x=0.1)
March 20, 2012 by Justin

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

Chemistry
Calculate the concentration of all species in a 0.240 solution.
March 27, 2012 by Anonymous

chemistry
a 0,25M solution of a week acid is 3% dissociated.calculate ka
April 4, 2012 by racha

chemistry
Calculate the pH of an Aqueous 3.8 x 10^-5 M solution of barium hydroxide. I need help.
August 21, 2012 by Vincent

chemistry
Calculate the molality of CsCl in a 19% by mass aqueous solution.
September 13, 2012 by cheri

Science
calculate the solubility of NaCl in a solution which contains 0.1 M CaCl2
October 12, 2012 by Tejpal Chandrakar

chemistry
0.30M nh3 and 0.20M HCL calculate the ph of solution kb=1.8 10^-5
March 2, 2013 by kanks

general chemistry
Calculate the molarity of each of the following solutions.70.8 in 2.51 of solution
March 7, 2013 by kelia

Chemistry
Calculate the pH of a buffer solution that contains 0.60 M NaH2PO4, and 0.26 M Na2HPO4.
April 14, 2013 by Maddie

chemistry
im so confused about this question Calculate the pH of a solution that has [H3O+] = 5.5 x 10-3.
April 29, 2013 by joe

chemistry
calculate the molarity of 29.25 grams of NaCl in 2.0 liters of solution
May 28, 2013 by Anonymous

Chemistry
Calculate the permanganate activity in an aqueous 0.18 M KMnO4 solution.
August 12, 2013 by RC

Chemistry
3.50 g of NH4Cl is added to 18.8 g of water. Calculate the molality of the solution.
October 16, 2013 by Shardai

chemistry
8.90 g of NH4Cl is added to 19.7 g of water. Calculate the molality of the solution
November 7, 2013 by Anonymous

ap chemistry
Calculate the ratio of [NH3]/[NH4+] that gives a solution of pH = 10.60.
February 4, 2014 by gabriella

Ap chem-Bases
Calculate the pH of a 0.2M solution of Triethylamine, (C2H5)3N, with a Kb of 4.0x10^-4
February 16, 2014 by Jessica

Ap chem-Bases
Calculate the pH of a 0.2M solution of Triethylamine, (C2H5)3N, with a Kb of 4.0x10^-4
February 17, 2014 by Jessica

Chemistry
A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].
April 27, 2014 by Anonymous

Chemistry
A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].
April 27, 2014 by Anonymous

Chemistry
Calculate the molar solubility of manganese II hydroxide in ph 12.85 solution.
May 26, 2014 by Anonymous

Science
Calculate the hydroxide ion of a solution of almond extracted of PH 3.8
June 6, 2014 by Debora

Chemistry
Calculate the pH of a 1.19M sodium formate, HCOONa, solution.
November 23, 2014 by Bill

Chemistry 120
Calculate the pH of aqueous solution 0.0000019 M KOH
December 15, 2014 by David Allen

Chemistry
Calculate the pH and concentration of H3O of a 0.285M HCl solution.
January 22, 2015 by Kat

Chemistry
Calculate the pH of a solution that is 0.185M in HC2H3O2 and 0.125M in KC2H3O2
March 6, 2015 by Gabby

Chemistry
Calculate pH of a solution that is 0.255M in CH3NH2 and 0.105M in CH3NH3Br
March 6, 2015 by Gabby

science
Calculate the PH of the 0.4g of NaoH in water to give 200ml of solution
December 15, 2015 by praful

chemistry 12u
how do i calculate this.. a solution of nitrous acid has a pH of 2.73 what is the [H3O+] ?
May 10, 2016 by julie

chrmistry
calculate the molar concentration of 1ppm solution of NaCl?
June 12, 2016 by Anonymous

Science
Calculate the volume of solute percent in 90ml solution with 5%
June 26, 2016 by Althea Jane Duran

Finance
Benson Incorporated has bonds with the following features par value of 1000.00 maturity is 10%. Determine if the bond sells for a premium, par, or discount and explain your answer. Calculate the value of the bond if interest is paid on an annual basis versus a semi annual ...
February 6, 2012 by howard

Algebra 1
Solve each equation. Rewrite the equation as two cases. 1). The absolute value of x - 2 minus 3 equals 5. A: I know one of the solutions is 10. However, I do not believe there is a second solution. 2). The absolute value of x + 7 increased by 2 = 10. A: I know one of the ...
October 2, 2013 by Anonymous

CHEM
A 0.552 g sample of ascorbic acid(Vitamin C) was dissolved in water to a total volume of 20.0 ml and titrated with 0.1103 M KOH. The equivalence point occurred at 28.42 ml. The pH of the solution at 10.0 ml of added base was 3.72. From this data, determine the molar mass and ...
March 21, 2012 by Cooper

chemistry
calculate the concentration of each solutions: 3 moles of solute dissolved in 2 liter of solution 6 moles of solute dissolved on 9 liters of solution 4 moles of solute dissolved in 3 liters of solution
March 29, 2010 by jess

Chemistry
1.) Watch the animation, and observe the titration process using a standard 0.100 M sodium hydroxide solution to titrate 50.0 mL of a 0.100 M hydrochloric acid solution. Identify which of the following statements regarding acid-base titrations are correct Drag items A-F to: ...
November 19, 2015 by LuigiR

Chemistry
How would one work through this problem? -Calculate the number of liters of 1.25M solution that can be made from 6.400g of barium nitrate. - I know that it's just stoichiometry, but I'm confused. The formula for molarity is the number of moles of the solute divided by liters ...
May 7, 2016 by Charlie

chemistry
Calculate the enthalpy of change, Delta H of rxn, for each of the reactions. record the values in the data table part 2 I calculated the heat of rxn of the HCl +NaOH------NaCl + H2O. How do i go from here to enthalpy of change
January 8, 2012 by AP Chemistry Question

Chemistry
Calculate the mass of baking soda, NaHCO3, needed to neutralize 3.0 mL of 3.0 M hydrochloric acid, HCl(aq). Ok, so I'm super confused. I have the equation, but I'm stuck with what to do with it. Equation: NaHCO3 + HCL --> NaCl + H2O + CO2
February 27, 2013 by Sarah

Chemistry
When 9.08 times 10^5 grams (one ton) of sodium chloride are electrolyzed in the commerical production of Chlorine, 5.24 times 10^5 grams of Chlorine are produced: 2 NaCl (aq) + 2 H2O (l) >>H2 (g) + Cl2 (g) + 2 NaOH (aq). Calculate the percentage yield.
June 10, 2013 by Shane

Chemistry
When 9.08 times 10^5 grams (one ton) of sodium chloride are electrolyzed in the commerical production of Chlorine, 5.24 times 10^5 grams of Chlorine are produced: 2 NaCl (aq) + 2 H2O (l) >>H2 (g) + Cl2 (g) + 2 NaOH (aq). Calculate the percentage yield.
June 10, 2013 by Shane

chemistry
How to find moles given oxidation numbers and chemical formula? Trying to do my chemistry lab but i'm super duper stuck. please help me i'm gonna die. this is the part i'm stuck on: The overall charge on the complex, [Ni(en)(H2O)]^2+ * SO4^2- * H2O is zero; the charge on ...
November 15, 2012 by dr bob's number one fan

Chemistry
A solution containing excess lead(ii) nitrate is reacted with 380.0ML of 0.250mol/L potassium iodide solution. A bright yellow Precipitate is of lead(ii) iodide is formed. Calculate the mass of lead (ii) iodide that should be formed. Pb(NO3)2+2KI-> 2KNO3+PbI2
June 17, 2015 by Robyn

Chemistry
Question from text: "The reaction between phosphorus and chlorine is described by the equation, P4(s) + 6 Cl2(g) ↔ 4 PCl3(l). At equilibrium, the concentration of Cl2 is found to be 0.87 M. Calculate Keq." Keq = [PCl3]^4 / [P4] [Cl2]^6 I am not seeing how to solve this ...
January 28, 2016 by Jennifer

Statistics for Business
Consider the following sample of data: 11.2, 28.4, 32.6, 17, 13.5, 2.2, 38, 41.4, 1.9, 14.4, 21.8, 23.8 a) Calculate the max, min, Q1, median, and Q3 b) Calculate the average c) Calculate the standard deviation d) Calculate the variance
January 19, 2014 by thomas

Chemistry
a solution of 0.2113 g of water dissolv ed in 25g of a solvent freezes at 11.5 degrees celcius below the freezing point of the solvent. what is the Kf for the solvent? A)0.735 B)1.36 c)5.39 D)24.5 Help!!! delta T = Kf*molality Calculate molality = #mols solute/kg solvent, plug...
April 27, 2007 by natali

Chemistry, help!
how do you calculate this: Calculate the mass of copper needed to displace 5.0g of silver from silver nitrate solution. (Relative Atomic Masses: Ag=108, Cu=63.5) Eqn=Cu+2AgNO3->Cu(NO3)2+2Ag How do you write a half equation? Complete the half equation to show the oxidising ...
January 20, 2008 by Anonymous

Chemistry
IN the polystyrene beaker, mix 20mL of 0.1 M Acetic acid and 25mL of 0.1M Sodium Acetate and immediately measure the pH. Remove the electrode and add 5ml of 0.1 M HCl to this buffer. Stir the solution and measure the pH. _______________ INFO: concentration of acetic acid= 0.1M...
March 28, 2010 by Saira

Science
How much sodium hydroxide, at what concentration, do I need to add to 500 mL of 0.1 N HCL to obtain pH 6.8. How do you calculate this? pH = -log(H^+) M HCl = N HCl mols = M x L. After you know mols HCl you have, then make a solution of NaOH and calculate how much of that must ...
February 5, 2007 by Ruby

chemistry
A student generates H2(g) over water using the reaction between zinc and hydrochloric acid Zn(s)+ 2HCl(aq)---> ZnCl2(aq)+ H2(g) Data: Mass of vial and zinc 15.5082 mass of vial 15.3972 mass of zinc 0.111 final burette reading 45.30mL barometric pressure: Patm 100.6kPa ...
November 23, 2011 by Yuli

Algebra
How do you solve the following problem? 3(4+4x)= 12x+2 It has no solution. X can be any value, and it wont equal.
April 10, 2007 by James

absolute value
|8m+7|=9 8m+7=-9 or 8m+7=9 -7=-7 -7=-7 8m/8=-16/8 8m/m=2/8 m=-2 m=1/4 the solution set is {-2, 1/4} Is this correct or do I need to go further or completely wrong!
March 21, 2008 by Kally

college
Which of the following choices is a solution for: (-3-i)x1 + (1-2i)x2 = 0 (-7-9i)x1 + (7-4i)x2 = 0 for any value of the variable t [x1] = ? [x2] A: [5] [1+7i] * t B: [5] [1-7i] * t C: [5] [-1-7i] * t D: [5] [-1+7i] * t This is linear algebra by the way;
December 4, 2009 by Michael

Chemistry
A 0.490 M solution of an unknown monoprotic weak acid, HA, is 2.80% ionized. What is the value of Ka for HA?
April 5, 2010 by Jenny

Math
Determine the value(s)of k that give the type of solution indicated: 2x^2+5x-2(k-1)=0. Show your work.
September 14, 2010 by Mr. Seuss

Algebra-please check
What is the solution for absolute value of -1 + x = 5 I think the two solutions are x = 6 and x = (-4)
October 6, 2010 by Tanya

Algebra
Using the substitution method, what is the value of a in the solution to the system of equations below? a=3b+7 4a+9b=70
March 31, 2013 by Angie

math
find the value of k such that the equation e^(2x)=krootx has exactly one solution.
April 4, 2013 by tom

Algebra
2. What is the value of x in the solution to the system of equations below? 15x 12y = 13 30x + 9y = 4
February 4, 2016 by Astral Tellurian

chemistry
if it requires 35.0 milliliters of 0.50 molar NaOH to neutralize 25.0 milliliters of HCl, what is the concentration of the HCl solution? Balanced equation: NaOH + HCl yields NaCl + H2O
November 17, 2010 by smith

chemistry
If it requires 30.0 milliliters of 1.2 molar HCl to neutralize 20.0 milliliters of NaOH, what is the concentration of the NaOH solution? Balanced equation: NaOH + HCl NaCl + H2O (3 points)
June 22, 2011 by Anonymous

physics
Two crates A and B connected together by a light rope are pulled along a factory floor by an applied force, F. Crate A has a mass of 50 kg and the coefficient of friction (μ) between crate A and the floor is 0,25. Crate B has a mass of 35 kg and μ between B and the ...
June 3, 2012 by Nick

Chemistry
A goal of the acid-base titration in this scenario is to determine the concentration of sodium hydroxide solution. To do this, a 1.3000 g sample of potassium hydrogen phthalate (KHC8H4O4) is massed out. The KHP has one acid proton (H+). The solid is dissolved in a beaker and 2...
September 26, 2015 by Seth

Statistics:Z and T Statistics: Confidence Interva
Z and T Statistics: Confidence Intervals and Significance Tests: A friend who hears that you are taking a statistics course asks for help with a specific chemistry lab report. She has made four independent measurements of the specific gravity of a compound. The results are : 4...
September 11, 2007 by Carma

Chemistry
A 1.00% by mass MgSO4 solution has a freezing point of -.192C. Water has a Kf of 1.86 (KxKg)/mol. a.) Estimate the vant Hoff i factor from the data. b.)Determine the total molality of all solute species. c.) Calculate the percentage dissociation of MgSO4 in this solution. I ...
January 27, 2014 by Anonymous

Chemistry lab
A 1.340gram sample of an unknown acid, H3A, was placed in a 250.0 mL volumetric flask and diluted to volume with water. A 45.35 mL sample of this acid solution was titrated with 37.77 mL of a 0.1006M NaOH solution. A) Using one set - up dimensional analysis B) Calculate the ...
March 22, 2016 by Stacy

maths
another question ? A is an acute angle and sin A=3/5 calculate the value of tan A ??
February 8, 2010 by Amy

calculus
to the nearest metre x=24m and y=6m. Calculate the upper bound for the value of xy
May 10, 2010 by Anonymous

AP CHEMISTRY
The Kb for ammonia (NH3) at 25C is 1.8* 10-5. By using the value of Kb, calculate ΔG for the equilibrium
March 23, 2012 by DAN

math
The 2nd, 3rd and 4th term of an ap are x-2,5,x+2 respectively ,calculate the value of x
March 30, 2012 by wale2

chemical equilibrium
Calculate the value of Kc for 4NH3(g) + 3O2(g)= 2N2(g) + 6H2O(l)
July 9, 2012 by mohamed

math
Interest= $432 r=6% t=8 years How do I calculate the principal and future value?
July 28, 2012 by LaCresha

chemistry
calculate the value of the equilibrium constant K for this reaction A+B <--> C from the following information 3C <--> D Kc= 7.1*10^-4 D <--> 3A + 3B Kc= 2.9*10^-2
November 3, 2012 by Brun

physics
calculate the value of g at a height of 3600 km above the surface of the earth?
December 12, 2012 by aish

Science
Calculate the wavelength of a photon with energy 2.45 eV. Enter the numerical value in m
March 2, 2013 by Anonymous

Science
Calculate the wavelength of a proton with energy 2.45 eV. Enter the numerical value in m
March 2, 2013 by Anonymous

ut
The acidity constant of acetic acid is 1.8 10-5. Calculate the % error of the measured Ka value.
October 31, 2013 by Anonymous

Math
The first three terms of an arithmetic progression are t, 2t-1, 2t+4. Calculate the value of t.
July 2, 2014 by Christopher

Chemistry
Calculate the value of ΔS when 1.10mol of Br2(l) is vaporized at 58.8 ∘C
April 2, 2015 by Austin

Chemistry
When 0.969 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 397C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. Delta Hrxn, for the reaction of CaO(s) + 2H+(aq) Ca2+(aq) + ...
February 24, 2008 by Anonymous

chem-help pls!
When 0.975 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 400C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. Hrxn, for the reaction of CaO(s) + 2H+(aq) Ca2+(aq) + H2O(l) ...
February 25, 2008 by Anonymous

Algebra 1
A restaurant has one type of lemonade that has 12% sugar and another that is 7% sugar. How many gallons of each does the restaurant need to make 20 gallons of a lemonade mixture that is 10% sugar? a. 12 gallons of the 12% lemonade and 8 gallons of the 7% lemonade. b.10 gallons...
January 5, 2016 by rachel.

Chemistry 30
A mixture of 2.5 moles of H2O and 100 g of C are placed in a 50.0 L container and allowed to come to equilibrium in the following reaction: C(s) + H2O(g)  CO(g) + H2(g) The equilibrium concentration of hydrogen gas is found to be 0.040 M. What is the ...
September 30, 2014 by Ade

Chem
A mixture of 2.5 moles of H2O and 100 g of C are placed in a 50.0 L container and allowed to come to equilibrium in the following reaction: C(s) + H2O(g)  CO(g) + H2(g) The equilibrium concentration of hydrogen gas is found to be 0.040 M. What is the ...
October 3, 2014 by Ade

Chemistry
What is the molarity of HCL if it takes 16.5 mL of 0.100 M NaOH to titrate 10.0 mL of HCl? HCl + NaOH -> H2O + NaCl molarity = moles of solute/liters of solution
September 18, 2014 by Selena

Chemistry
What is the vapor pressure at 23 degree C of a solution of 1.20g of naphthalene, C10H8 in 25.6 g of benzene, C6H6? The vapor pressure of naphthalene can be neglected. Calculate the vapor-pressure lowering the solution
February 7, 2008 by Lauren

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