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March 27, 2015

Search: Calculate the solubility (in grams per 100 mL of solution) of magnesium hydroxide in a solution buffered at pH = 12.

Number of results: 64,160

chemistry
ou weigh out Potassium Permanganate, Mass of KMnO4 (MW=158.034).......... 0.1569 g You dissolve it completely in water.......... 46.00 mL (a) Molarity of MnO4- solution........................... ________________ M You pipet out your UNKNOWN............. 0.90 mL You acidify ...
July 26, 2013 by faruk

chemistry
ou weigh out Potassium Permanganate, Mass of KMnO4 (MW=158.034).......... 0.1569 g You dissolve it completely in water.......... 46.00 mL (a) Molarity of MnO4- solution........................... ________________ M You pipet out your UNKNOWN............. 0.90 mL You acidify ...
July 27, 2013 by faruk

Fat gram calculator
Design a program that asks the user for the number of fat grams and calories in a food item. Validate the input as follows. Make sure the number of fat grams and calories are not less than 0. According to nutritional formulas, the number of calories cannot exceed fat grams * 9...
October 13, 2013 by John

Chemistry
What is the percentage yield for a reaction if you predict the formation of 21 grams of C6H12 and actually recomvered only 3.8 grams? is the answer 18% 3.8g/21g x 100% pls verify.
October 17, 2010 by Devin

Chemistry
Please help. Calculate the pH at the following points during the titration of 100.0 mL of 0.20 M acetic acid (Ka for acetic acid = 1.8 x 10-5) with 0.10M sodium hydroxide 1. before addition of any base 2. after addition of 30.0mL of base 3. after addition of 100.0mL of base 4...
April 26, 2011 by Kendall

Chem again
The solubility of Acetanilide in hot and cold water is: Temperature.........Solubility in 100ml H20 100C....................5.5g 0C........................0.53g What is the maximum recovery if 5.0g of acetanilide is recrystallized from 100mL of water? My ans: So this is what I...
March 8, 2010 by Natasha

chemistry
An aqueous solution is analyzed and found to contain potassium ions and sulfite ions. Write the equation for the dissolution of the salt that produced this solution. If the solution contains 0.600 mol of potassium ions, how many moles of sulfite ions are present? ...
February 23, 2014 by lebanon

chemistry
Calculate the pH of the following aqueous solution: 1.00 mol/L sulfuric acid, H2SO4(aq)
April 5, 2008 by Bradely

Chemistry
Calculate the pH of concentrated hydrochloric acid if this solution is 24.8 % HCl by weight and has a density of 1.16 g/mL.
November 1, 2008 by A.A

Chemistry
I am sooo confused on how to solve this problem, can anyone help me understand? calculate the pH of 0.10 M HCI solution?
October 1, 2009 by Jessica

Chemistry
Calculate the [h3o+] of the following polyprotic acid solution: 0.135 M H2CO3
March 25, 2010 by Krysten

chemistry
Calculate the number of mL you would use to prepare 5.0 L of 0.20 M NaOH from a 5.23 M stock solution.
April 26, 2010 by laney

chemistry
Calculate the pH of the solution that results from the mixture. 170 mL of 0.12 M C2H5NH2 with 285.0 mL of 0.22 M C2H5NH3Cl.
July 28, 2010 by Ellen

Chemistry
Calculate the molality of CsCl in a 6% by mass aqueous solution. Answer in units of m.
September 23, 2010 by Cheyenne

Chemistry
Calculate the molality of CsCl in a 18% by mass aqueous solution. Answer in units of m.
October 11, 2010 by Mike

Chemistry
Calculate the [H3O+] of the following polyprotic acid solution: 0.145 M H3C6H5O3?
October 24, 2010 by Anonymous

chemistry
Calculate the [H3O+] of the following polyprotic acid solution: 0.145 M H3C6H5O3?
October 24, 2010 by Anonymous

chemistry
Calculate the ionization constant, Ka, of phenol (HC6H5O), a weak acid, if a 0.25 M solution of it has a pH of 5.24.
November 15, 2010 by Audrey

Chemistry
Calculate the concentration of the solution in mass percent: 32.3 mg KNO3 in 2.44g of H2O.
November 30, 2010 by Kelsey G

Chemistry
Calculate [OH-] and pH for the following strong base solution: 10.0 mL of 0.0105 M Ca(OH)2 diluted to 500.0 mL
April 18, 2011 by Kendall

Chemistry
how do you calculate the pOH of a 0.25M solution of monochloroacetic acetic acid at 25C
May 11, 2011 by Illyana

chemistry
Calculate the number of moles of FeSO4 in 25cm3 of a 0.2mol dm3 solution
June 21, 2011 by Richard

Chemistry
calculate the pH and the pOH of an aqueous solution that is 0.035 M In HCI and 0.080 M in HBr?
July 23, 2011 by Josh

Prcts chemistry
Calculate the pH of 0.0115M acetic acid solution at 25 degrees celcius with Ka = 1.75*10^-5
September 22, 2011 by Gift

chem
calculate the molality of a solution of 2.34g acetic acid, HC2H3O2, in 35.0 g water
October 11, 2011 by michael

chemistry
Calculate the number of moles of each ion in 10.5 mL of 0.205 M cadmium phosphate solution.
January 22, 2012 by student

chemistry
Calculate the number of moles of each ion in 10.5 mL of 0.205 M cadmium phosphate solution.
January 22, 2012 by diana

Chemistry
Calculate the molality of a solution prepared by dissolving 31.6 g of Fe2O3 in 750. g of water
April 8, 2012 by Tina

gen chemistry
calculate the percent m/v concentration of a 5L solution containing 500g NaCl
May 18, 2012 by ashia3

College Biology
Calculate the concentration in Moles for a 5mgMgCl2 sample in 2L of solution. Then how many ions are in it?
September 9, 2012 by cutiepie

Chemistry
How would I calculate the mass of 20ml of a 3% hydrogen peroxide from a 30% H2O2 solution?
September 26, 2012 by John

Chemistry
Calculate the pH and the pOH of an aqueous solution that is 0.025 M in HCl(aq) and 0.075 M in HBr(aq) at 25C.
October 6, 2012 by Alex

Chemistry
Calculate the mass concentration of H2SO4 in a solution of 36%, with density 1.84g/cm3
January 20, 2013 by Anonymous

general chemistry
Calculate the molarity of each of the following solutions.70.8g C2H60 in 2.51L of solution
March 7, 2013 by kelia

Chemistry
7. A solution is prepared by dissolving 8.5 g NaHCO3 and 12.7 g Na2CO3 in 500.0 mL of water. Calculate the pH.
March 20, 2013 by Nick

Chemistry
7. A solution is prepared by dissolving 8.5 g NaHCO3 and 12.7 g Na2CO3 in 500.0 mL of water. Calculate the pH.
March 20, 2013 by Nick

Chemistry
Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??
April 9, 2013 by Karen

Chemistry
Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??
April 9, 2013 by Karen

chem
calculate the concentration of all ions present in 58.7 mg NH4Br in 500 mL of solution
April 11, 2013 by celine

Chemistry II
Calculate the pH at the equivalence point in the titration of 50ml of 0.20 M methylamine (Kb=4.3*10^-4) with a 0.40 M HCL solution.
May 3, 2013 by Katie

Chemistry
If 50 mL of a saturated solution of KClO3 at 55C is cooled to 15C, calculate the mass of precipitate that will form
May 20, 2013 by LOL

gpc
Calculate the molarity of a bleach solution that is 8% by mass (m/v) or 8g/100mL sodium hypochlorite.
March 3, 2014 by samry

Chemistry
Calculate the pH of the solution that results from mixing 30.0 mL of 0.050 M HCN(aq) with 70.0 mL of 0.030 M NaCN.
March 19, 2014 by Anonymous

chemistry
Calculate the concentration in % (m/m) of a solution containing 20.5 g of LiF dissolved in 340.0 g of H2O. a.1.14% (m/m) b.5.69% (m/m) c.6.03% (m/m) d.6.42% (m/m)
March 23, 2014 by julia

chemistry
Calculate the molality of sulphuric acid solution in which mole fraction of water is .85
June 3, 2014 by swastika

chemistry
calculate the moles of solute present in 1.25 centimeter cube of 0.5 M h3po4 solution
June 19, 2014 by hifsa

CHEM
calculate the molality of a solution formed by dissolving 27.8g of LiI in 500mL of water
October 12, 2014 by Anonymous

Chemisty
calculate the concentration of the solution of 6.4g calcium sulafte is added to 0.125l of water
December 18, 2014 by EFonts

chemistry
A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal behavior) is: Answer
February 22, 2012 by renee

chemistry
A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal behavior) is: Answer
February 22, 2012 by renee

college chemistry
A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal behavior) is:
February 26, 2012 by renee

Chemistry
I am trying to figure out how much 1.134 grams worth of gold will cost, if gold is at 380 dollars an ounce. I set up proportions like this: 380 doll./1.34 grams (how many grams are in an ounce) = BLANK/1.134 grams (mass of coins). I got $321.58. But this is incredibly ...
April 23, 2009 by Aline

Precalculus
Which of the following is a solution for the equation 1/485tan^2x = 0? a) pi b) pi/2 c) 485pi d) no solution Which of the following is NOT a solution to the equation 4sin^2x = 1 for 0≤x≤2pi? a) 30 degrees b) 210 degrees c) 150 degrees d) 120 degrees?
January 27, 2012 by Melissa

Chem again sorry
A solution of sodium chloride in water has a vapor pressure of 18.3 torr at 25C. What is the mole fraction of NaCl in this solution? __________ What would be the vapor pressure of this solution at 45C? The vapor pressure of pure water is 23.8 torr at 25C and 71.9 torr at 45...
November 30, 2008 by Dina

math
One of the world's fastest roller coasters is located in a theme park in Valencia, California. Riders go from 0 to 100 miles per hour in 7 seconds. Find the acceleration of the roller coaster during this time interval in miles per second squared. Math - Reiny, Monday, March 8...
September 27, 2010 by erin

chemistry
A solution is prepared by dissolving 17.1grams of sucrose, c12h22o11, in 275grams of h20. what is the molality of that solution? I know what formula to use, but can someone please show me all the steps to get the answer. Thanks:)
April 6, 2008 by Miley

Chemistry
Write half-reactions for the oxidation and reduction processes for the following: Sn2+ + IO3- -> Sn4+ + I- (acidic solution) MN2+ + H2O2 -> MnO2 + H2O (basic solution)
May 26, 2010 by Mary

chemistry
to what volume should you dilute 125mL of an 8.00M CuCl2 solution so that 50.0mL of the diluted solution contains 5.9g KNO3 I have a hard time determing the M1V1=M2V2 is
November 6, 2011 by swtnblk

chem
Assume that 35.0 mL of a 0.13 M solution of a weak base B that accepts one proton is titrated with a 0.13 M solution of the monoprotic strong acid HX. (a) How many moles of HX have been added at the equivalence point?
March 24, 2013 by hannah

analytical chemistry
What volume (in liters) of 0.96 M KOH solution should be added to a 0.130 L solution containing 10.2 g of glutamic acid hydrochloride (Glu, FW=183.59; pKa1=2.23, pKa2 =4.42, pKa3=9.95) to get to pH 9.90?
March 27, 2014 by joi

algebra
solve the following systwm graphically. Be sure to check your solution. if the system has an infinite number of solutions, use set-builder notation to write no solution, state this. 4y=x+8, x=2/3y+2
July 9, 2014 by jessica

chemistry
How many milliliters of a 0.200 M HI solution are needed to reduce 21.5 mL of a 0.365 M KMnO4 solution according to the following equation: 10HI+2KMnO4+3H2SO4 ---> 5I2+ 2MnSO4 +K2SO4+ 8H2O
October 18, 2014 by Kayla

chemistry
An aqueous solution contains 0.445 M ethylamine (C2H5NH2). How many mL of 0.226 M hydrochloric acid would have to be added to 150 mL of this solution in order to prepare a buffer with a pH of 10.200
March 16, 2015 by chem

AP Chem
A sample of solid KCl (potassium chloride) weighing 0.500 g is mixed with an unweighed sample of solid MgCl2 (magnesium chloride) and the mixture is then completely dissolved in water to form a clear solution. An aqueous solution of AgNO3 (silver nitrate) is then added to this...
October 5, 2010 by benji

chemistry
A sample of solid KCl (potassium chloride) weighing 0.500 g is mixed with an unweighed sample of solid MgCl2 (magnesium chloride) and the mixture is then completely dissolved in water to form a clear solution. An aqueous solution of AgNO3 (silver nitrate) is then added to this...
October 6, 2010 by Anonymous

chemistry
a student determines the molar mass of methanol by the method used in this experiment. she found that the equilibrium temperature of a mixture of ice and pure water was .4 degrees Celsius on her thermometer. when she added 10g of her sample to the mixture, the temperature, ...
May 22, 2012 by liz

chemistry
How do I write the skeleton equation representing the heating o f magnesium carbonate to produce solid magnesium oxide and carbon dioxide gas?
March 15, 2010 by Brittany

chemistry
provide with enough heat, magnesium and oxygen can undergo a synthesis reaction. how much magnesium is neede if 3.5kg of product is desired?
November 11, 2010 by tarkan

chemistry
how does the number given just below the symbol for magnesium (rounded to 0.01) compare with average mass (amu) of one magnesium atom
September 28, 2011 by toya

Chemistry
How many liters of hydrogen gas can be made from 65.5g of magnesium at STP? Magnesium reacts to sulfric acid according to this equation... Mg+H2SO4-->MgSO4+H2
March 5, 2012 by Cynthia

Chemistry
please HELP!! mass of magnesium chloride =.2 mass of chlorine in magnesium chloride =.1 A)moles of magnesium? B)moles of chlorine? C)moles of magnesium divided by the smaller number of moles? D)moles of chlorine divided by the smaller number of moles? E)experimental empirical ...
October 25, 2014 by Gina

AP CHEM
I'm currently working on a lab in which I have to make the solution boil at 245 degrees F. The solution will be a mix of ethylene glycol and I have to caluculate the volumes of water and solute needed to make the solution. here's my work so far. X= mL C2H4(OH)2 175mL-X=mL H20 ...
February 10, 2008 by Jonathan

Chemistry
Sorry about that The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. Luminol is so sensitive that it can detect blood that has been diluted 10,000 times...
February 11, 2009 by HELP PLEASEEE

math
a 9 percent salt water solution is mixed with 4 oz. of an 18 percent salt water solution in order to obtain a 15 percent salt water solution. how much of the first should be used?
September 2, 2010 by Bob

Chem
Ca(s) + 2H+(aq) → Ca2+(aq) + H2(g) An experiment is performed to determine the volume of hydrogen gas produced when calcium reacts with excess HCl(aq) as represented by the net ionic equation above. A 0.0720 g sample of pure calcium and a solution of 1.0 M HCl(aq) were ...
April 23, 2013 by Jess

CHEMISTRY--PLEASE HELP, URGENT
A saturated solution of CaSO4(aq) is made in a beaker until there is excess calcium sulfate resting at the bottom. Then solid potassium sulfate is added. Which of the following is true? (The Ksp for potassium sulfate is larger than the Ksp for calcium sulfate) a. More calcium ...
April 12, 2010 by Maggie

Chemistry
Suppose the solubility of PbCl2 (s) 5.6 x 10^-2 M. Calculate the ksp
July 10, 2013 by Meg

chemistry
Sulfur and chlorine can react together to form S2Cl2. When 1.00g of this sulfur chloride reacted with water, 0.36g of a yellow ppt of sulfur was formed together with a solution contianing a mixture of sulfurous acid, H2SO3, and HCl acid. Use the above data to deduce the ...
April 10, 2013 by hina

Chemistry
A)250 g of LiBr is dissolved in 200g of water 100 degrees C. The solution is then cooled to 20 degrees C. How much precipitate (if any) is formed? B) 42 g of KCl is dissolved in 100g of water at 50 degrees C. The solution is then cooled to 20 degrees C. How much precipitate (...
May 2, 2010 by Jack

Chemistry
Can someone please help me answer these questions? Is additional information other than what is given needed to solve? Thanks in advance. 1) Calculate the PH of a buffer containing 0.100 M propanoic acid, HC3H5O2 and .100 M NaC3H502 after the following have been added. Ka for ...
December 13, 2013 by Charles

Chemistry
One commercial method used to peel potatoes is to soak them in a solution of NaOH for a short time, remove them from the NaOH, and spray off the peel. The concentration of NaOH is normally in the range of 3 to 6 M. The NaOH is analyzed periodically. In one such analysis, 45.7 ...
January 12, 2011 by Chin

Chemistry
This question was posted: At 22 C an excess amount of a generic metal hydroxide M(OH)2, is mixed with pure water. The resulting equilibrium solution has a pH of 10.56. What is the Ksp of the compound at 22 C? I have found my [OH-] concentration (3.63x10^-4) but I am looking ...
July 8, 2012 by jen

Chemistry
You isolate an acidic compound in an experiment by first separating it from the organic layer. Then you have a solution containing a salt of an acid. You acidify it using concentrated HCl. A precipitation begins to form while the solution is still basic.. why? You continue the...
October 23, 2011 by Rachel

chemistry
A 20.00 ml stock sample of HBr is diluted to 50 mL. If 18.76 ml of 0.1345 M KOH was required to reach the equivalence point, what is the concentration of the stock HBr solution? Is my answer correct? Titration problems can be solved with the MV=MV equation. The Molarity * ...
September 22, 2008 by Vana

chemistry
it is desired to prepare 250.0mL of a standard solution having a concentration of 0.1000M AgNo3. How many grams of a sample of AgNO3 of 98.8% purity are required for this purpose?
March 25, 2010 by T

chemistry
it is desired to prepare 250.0mL of a standard solution having a concentration of 0.1000M AgNo3. How many grams of a sample of AgNO3 of 98.8% purity are required for this purpose?
March 25, 2010 by T

chemistry
How many grams of solid sodium sulfate can be added to 1000L of a 0.02mol/L solution of calcium chloride before a precipitate forms? (Ksp for calcium is 6.1x10^-5)
July 27, 2010 by Kat

chemistry
How many grams of KCl are required to make .75 L of 0.29 M solution? Round to one decimal place. i got .2907 is this correct im not sure about the decimal places thanks
October 4, 2010 by amber

chemistry
How many grams of NAC2H3O2 must be dissolve in enough water to prepare 250.0 mL of a solution with a pH= 9.200? Molar mass of NaC2H3O2 ia 82.03 g/mol. Ka for C2H3O2H is 1.8x10^-5
October 3, 2011 by PLEASE HELP!

chemistry
How many milliliters of a 0.5 molar HCl solution are needed to react completely with 11 grams of zinc according to the following equation? ? HCl + ? Zn ! ? ZnCl2 + ? H2 Answer in units of mL
September 19, 2012 by cheri

Chemistry
I have a few question for my review. 1) How would you prepare 30.0 ml of 0.600M HNO3 From a stock solution of 4.00M HNO3? What volume in ML of the 4.00 M HNo3 will you need? 2) if a 83.5 & was repoarted for a reaction that could have produced 12.1 g of product? what was the ...
October 10, 2013 by Matt

chemistry
A volume of 100mL of 1.00 M HCl solution is titrated with 1.00 M NaOH solution. You added the following quantities of 1.00 M NaOH to the reaction flask. Classify the following conditions based on whether they are before the equivalence point, at the equivalence point, or after...
August 6, 2012 by Anon

Chemistry
Lithium nitride reacts with water to form ammonia and aqueous lithium hydroxide. Li3N(s) + 3H2O(l) ==> NH3(g) + 3LiOH(aq) a)What mass of water is needed to react with 32.9g Li3N? b)When the above reaction takes place, how many molecules of NH3 are produced? c)Calculate the ...
April 5, 2010 by Kim

Math- Systems of equations and inequalities
Joe wants to fence a rectangular pen for his goats. The length of the pen should be at least 60 ft, and the distance around should be no more than 260 ft. Which system of inequalities and graph represent the possible dimensions of the pen? (1 point) Terry has completed 15 ...
January 13, 2014 by Gabby

Chemistry
The explosive residue contains carbon, hydrogen and nitrogen where the percentage of nitrogen is high, calculate it from 0.5g of residue which eliminates ammonia gas on reaction with sodium hydroxide, and absorb by 50mL of Nby10 H2SO4. Unused acid is neutralized/titrated with ...
March 12, 2012 by Farah

chemistry
Oxalic acid (H2C2O4) can be used to remove rust according to the following balanced equation: Fe2O3 + 6H2C2O4 --> 2Fe(C2O4)33- +3H2O + 6H+ Calculate the number of grams of rust that can be removed by 5.00 x 102 ml of a 0.122M solution of oxalic acid. I know i need to ...
October 4, 2010 by amber

Chemistry
Use activity coefficients to find the concentration of hydrogen ions in a solution of 75.0 mM butanoic acid and 0.01 M NaCl. The ionization constant of butanoic acid is Ka = 1.52 10-5. Take the size of C3H7COO to be 500 pm. What is the concentration of H+? What is the pH of...
October 11, 2013 by martini

chemistry
A solution of ethanol in water boils at 101.5 degrees C. what is the molarity? delta T = i*Kb *molality. Delta T = 101.5 - 100 = 1.5. i = 1. I should comment here that the freezing point constant and the boiling point contant works with a non-volatile solute in a solvent such ...
May 31, 2007 by jessica

chemistry
Equillibrium, an example given by my textbook confused me. First it shows a reaction inside a soft drink: co2(g)--><--co2(aq) but than it says the reaction inside a soft drink would involve solubility equillibrium because it involves a change in solubility between ...
August 6, 2009 by kevin

chemistry
The solubility of acetanilide is 18.5 g in 100 mL of methanol at 0 °C, and 59.2 g in 100 mL of methanol at 60 °C. What is the maximum percent recovery that can be achieved for the recrystallization of acetanilide from methanol?
September 17, 2014 by Anonymous

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