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March 1, 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: 63,403

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

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

Business Communication
When someone complains about a problem, is it a good idea to quickly suggest a solution? A. Yes, because a quick suggestion shows you think quickly. B. Yes, because offering a solution shows that you care about the other person. C. No, because the other person may not be ready...
March 2, 2012 by Sheilah

Algebra
How do you know if a value is a solution for an inequality? How is this different from determining if a value is a solution to an equation? If replacing the equal sign of an equation and put an inequality sign in its polace, is there ever a time when the same value will be a ...
September 18, 2008 by Kim

Chemistry
How many moles of HCl must be added to 100mL of a 0.100 M solution of methylamine (pKb=3.36) to give a buffer having a pH of 10.0?
April 24, 2011 by Joe

chemistry
What is the mass of dry NaCl sample should be taken for 100 cm3 of 0.5 mol/dm3 aqueous solution?
November 15, 2012 by michelle

analytical chem
What is the pH of a solution by dissolving 8.00 mmol of NaOAC in 200 mL of 0.100 m HOAC. (you need the pka for acetic acid)
December 6, 2012 by ak

chemistry
If we dissolve 170g sodium acetate in 100g water at 100 degree centigrade , the solution will be saturated or supersaturated
November 20, 2014 by jannat

chemistry
The distribution coefficient between ether & water for aspirin at room temperature is 3.5. What weight of aspirin would be extracted by a single extraction with 150 ml water from a solution of 10 gms of aspirin in 100 ml ether? Calculate the weight of aspirin which would be ...
June 18, 2012 by nimfa

Chemistry
A .682 g sample of an unknown weak monoprotic acid, HA, was dissolved in sufficient water to make 50mL of solution and was titrated with a .135 M NaOH solution. After the addition of 10.6mL of base, a pH of 5.65 was recorded. The equivalence point was reached after the ...
May 9, 2007 by Sara

college-chemistry
2. A 0.1967 g sample of pure ascorbic acid is weighed out and dissolved in 50.0 mL of distilled water in an Erlenmeyer flask. One week later, when about one third of the water in the flask has evaporated, this solution is titrated against 0.01735 M KIO3 solution and requires ...
November 15, 2009 by john

chemistry
How many milliliters of glycerol, d=1.26 g/ml, must be added per kilogram of water to produce a solution with 4.55 mol% C3H8O3 ?
February 20, 2010 by sab

Chemistry
Hydrolysis of Salt: Using the universal indicator we had to determine the pH of sodium acetate, and the results i got was pH- 8.5 . Now i have to explain this with a equation to show hydrolysis. I don't know how to write it out but, Sodium is not hydrolyzed and acetate is ...
March 24, 2010 by Saira

Chemistry
Posted by Hannah on Saturday, April 18, 2009 at 3:05pm. Find the pH of a 0.010M solution of NH4ClO4 and the pH of a 0.010M solution of NH4C2H3O2. Responses * chemistry - Anonymous, Saturday, April 18, 2009 at 3:36pm after finding the ph of the corresponding ions in these two ...
April 18, 2009 by Anonymous

Chemistry
The molar mass of glucose is 180.16g/mol A. How much glucose is needed to make 500 ml of a .44M (.44mol/1L) solution? .44M/L=180.16x.44/100ml=79.27/1000=.07927x500=39.64g/mol/550ml? B What volume of the .44M solution is needed to prepare 1L of a 5% glucose solution? Don't know...
December 2, 2014 by Amanda

Chemistry
I'm having a brain malfunction... how to calculate how many grams are in a mole of something? How many grams are in 3.80mol of sodium chloride (NaCl)?
February 27, 2015 by Jennie

Pre-Calc
Gold weighs 19.3 grams per cubic centimeter (cc), and silver weighs 10.5 grams per cc. A. Write a formula for the weight of one cc of a mizture of silver and gold in terms of the volume of gold in the cc. B. If one cc of mizture weighs 12.7 grams, what is the weight of gold in...
November 11, 2009 by Tritanianna

chem
A hemoglobin molecule (molar mass =65000 g) can bind up to 4 oxygen molecules. In a certain experiment a .085-L solutoin containing 6.0 g of deoxyhemoglobin was reacted with excess of oxygen in a constant-pressure calorimeter of negligible heat capacity. calculate the enthalpy...
October 4, 2008 by Mischa

chemistry
Calculate the pH range required to separate 99.99% of Cr3+ from Zn2+ by precipitation of Cr(OH)3(s) in a solution that is initially 0.034 M in both Cr3+ and Zn2+. Use the Ksp values from Table 16.2 of Chang and calculate the pH to the nearest 0.01 pH unit. Lowest pH= Highest pH=
March 25, 2012 by Tanner

chemistry
So I posted this question yesterday and was told I had a few typos.... I fixed them and here is the question again... Please help me!!! A solution of ferrous sulfate (FeSO4) is titrated with a solution of potassium permanganate in sulfuric acid. The balanced half reactions are...
January 5, 2010 by amy

chemistry
Reacting Mg with acid solution to form Mg salt and Hydrogen gas. What are the: 1.general reaction type 2. Chemical equation include phase 3. complete ionic equation include phase 4. chemical equation for the reaction between magnesium with water
October 3, 2012 by shay

geology
suppose you have a sample of clamshell at a paleoindian site and you measure the 14c activity of aa 100-gram sample of carbon as 320 disintegretions per scond (or 3.2 disingtegrations per gram of carbon per second). a. what was the activity(in disitegrations per second) for ...
October 16, 2007 by jon

chemestry
Based upon the previous question, what is the THEORETICAL YIELD (in grams) of Mg3N2 if you start with 10.0 grams of each reactant? previous question:consider the magnesium nitride addition reaction again. This time, suppose you start with 10.0 g of each reactant. What is the ...
November 17, 2010 by cristy

Chemistry
Phosphate standards used to generate the calibration curve are usually made by first preparing a stock solution of known concentration, then diluting it to the required concentration. First prepare a stock solution that is 1.00 x 10-2 M in phosphate ion. How many g of Na3PO4 ...
September 6, 2010 by Khaalid

Chemistry
50.00 mL samples of 0.200 mol/L potassium phosphate with an excess of 0.120 mol/L lead II nitrate solution. what is the minimum volume of lead II nitrate solution required? What volume of lead II nitrate solution should the instructor tell the students to use? Describe how the...
April 11, 2012 by Michelle

chemistry
Magnesium has three naturally occurring isotopes: Mg-24 with mass 24.3050 amu and a natural abundance of 78.99 %, Mg-25 with mass 24.9858 amu and a natural abundance of 10.00 %, and Mg-26 with mass 25.9826 amu and a natural abundance of 11.01 %. Calculate the atomic mass of ...
December 14, 2014 by Luis

Chem
A student was performing an extraction procedure of o-Xylene from water into octanol. The total mass of o-Xylene was 0.10 gram (molecular weight 106.2 g/mole). The volume of water was 990mL and volume of octanol 10 mL. There is a head space of 200 mL above the solution and it ...
July 31, 2013 by Sahara

Chemistry
1) it is found that .30 M solutions of the three shots Na3X, Na2Y and NaZ have pH's of 8.5, 7.0 and 10.5 not necessarily in order. (X,Y, and Z AE anions. Na is sodium ion) A) explain how anions can act as bases in aqueous solution. Write a chemical equation to explain your ...
April 6, 2014 by Reggie

chemistry
What is the mass of the organic product between 2M solution of cyclohexene and 45% solution of potassium permanganate? The volumes of the solutions are the same and equal to 45mL. All needed densities are approximated to 1g/cm3.
April 13, 2011 by jls9119

Calculus
1. I really don't understand what this problem is asking for The population P(t) of fish in a lake satisfies the logistic differential equation dP/dt = 3P - (P^2)/6000 If P(0) = 4000, what is ? Is the solution increasing or decreasing? && how would you find inc/dec of a ...
February 26, 2012 by Kaylen

Chemistry
A solution of AuCl- is mixed with a solution of Sn2+ under standard conditions. What is the equation? the answer is 2AuCl4- + 3Sn2+ -> 3Sn4+ + 2Au + 8Cl- how do i get this? ITS desperate... plz help me! THANK_YOU SO MUCH!
June 14, 2012 by Chemistry

Chemistry
What mass of sucrose (C12H22O11) would you combine with 5.28 102 g of water to make a solution with an osmotic pressure of 9.14 atm at 298 K? (Assume a density of 1.0 g/mL for the solution.) I came up with 67.5 but no luck...help please!!
July 3, 2012 by Anonymous

Chem II
Find the mass of sodium formate that must be dissolved in 200.00cm^3 of a 1.0M solution of formic acid to prepare a buffer solution with pH=3.40? I have no clue how to work this out. Please help me.
November 19, 2012 by Bianca

chemistry
the student's lab manual says to mix some of his CaCl2 solution with an aqueous solution of sodium carbonate (Na2CO3). What evidence of a chemical reaction would he expect to see?
December 17, 2012 by jalisa

Chemistry
How will the addition of sodium acetate to an acetic acid solution affect the pH? A. solution becomes hotter B. It will lower the pH C. It will raise the pH D. pH will not change E. pH cannot be measured I selected answer D and got it wrong. I don't understand why...
March 10, 2013 by Lisa

Algebra
Solve the following system of equations by the elimination method. 1/3x+1/4y=7 1/3x-3/4y=-9 a)The solution is___?(Type an ordered pair. Use integers or fractions for any numbers in the expression) b)Infinitely many solutions c)No solution
February 22, 2014 by SpaceGazing

chemistry
B. Everyone knows that water is supposed to boil at 100 C. Why did your water sample boil at a different temperature? C. While heating two different samples of water at sealevel, one boils at 102o C and one boils at 99.2o C. Calculate the percent error for each from the ...
September 16, 2011 by emmanuel

math
Help pllsss ASAP!!! have certain answers!! i try but i do not understand! help asap! give answers and walkthrough problems for me! 1. 2(x - 3) = 2x (1 point) one solution no solutions infinitely many solutions 2. 3(y - 3) = 2y - 9 + y (1 point) one solution no solutions ...
January 2, 2014 by ...

Chemistry
The density of methanol is .7918 g/ml/ How many grams of methanol do I have to add to 35.0ml of water to make a solution containing 25% methanol?
September 7, 2013 by DD

science
how many atoms of magnesium are in the magnesium molecule?
October 29, 2012 by mable

Chemistry
How many moles of magnesium are in Magnesium Chloride?
October 25, 2014 by Gina

chemistry
how to calculate grams in carbon dixoide?? grams = mols x molar mass grams CO2 = mols CO2 x 44
November 17, 2006 by Cindy

chemistry
When 45 grams of an alloy is dropped into 100.0 grams of water at 25 degrees celcius, the final temperature is 37 degrees celcius. what is the specific heat of the alloy? the alloys Temperature is 100 degrees celsius
June 11, 2008 by sdfsgfsf

Chemistry
Calculate the pH of a 100mL solution of 0.10M acetic acid ka=1.8x10(-5) i calculated the pH to be 2.87 from the square root of (1.8x10(-5) * 0.1, the negative log gives me the pH. The next question wants you to calculate the pH with 50mL HCl added. I found the pH to be 2.78 by...
October 25, 2011 by Kevin

MATH
For what integer 0<n<1000, does the following system of n linear equations have no complex solution? −10a1a1a1⋮a1+a2−10a2+a2+a2+a3+a3−10a3+a3+++++an+an+an−10an=9=99=999⋮=10n−1 Clarification: If the system always admits a ...
May 14, 2013 by intermediate player PLEASE HELP

math
How is this different from determining if a value is a solution to an equation? If you replace the equal sign of an equation and put an inequality sign in its place, is there ever a time when the same value will be a solution to both the equation and inequality? Write an ...
May 21, 2009 by scooby9132002

CROSS-CULTURAL COMMUNICATION
When someone complains about a problem,is it a good idea to quickly suggest a solution? A. Yes, because a quick suggestion shows you think quickly. B. Yes, because offering a solution shows that you care about the other person. C. No, because the other person may not be ready ...
September 10, 2012 by Deborah Roberts

chemistry
A total of 2.00mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 185g of solution. The reaction caused the temperature of the solution to rise from 21.0 to 24.7C . What is the enthalpy of this reaction? Assume that no heat is lost ...
November 25, 2011 by Yuli

Chemistry
Suppose a student used 28.4 ml of 0.100 M NaOH solution to neutralize the 25.0 ml of the lemon juice sample which contains citric acid (H3A)in it. H3A + 3NaOH -----> Na3A + 3H2O Molar mass of citric acid = 192.2 g/mole a)What is the molarity(M)of citric acid(H3A)in lemon ...
December 14, 2014 by Nam Le

Chemistry2
An electrochemical cell is created using gold and magnesium half-cells. a. Determine which half-cell will undergo oxidation and which will undergo reduction, identify anode and cathode, and calculate the voltage for the cell. You do not need to diagram the cell. b. If the mass...
November 27, 2010 by Adam

Chemistry
An electrochemical cell is created using gold and magnesium half-cells. a. Determine which half-cell will undergo oxidation and which will undergo reduction, identify anode and cathode, and calculate the voltage for the cell. You do not need to diagram the cell. b. If the mass...
November 30, 2010 by Jeffery

Chemistry
Calculate the change in mass of the In electrode after the cell supplies 100 mA of current for 10 minutes. The balanced redox reaction is 2In+Cl2=2In+ + 2Cl-. I understand the idea behind the question, I just don't know if I should use 1 mol In per 1 mol e- or 1 mol In per 2 ...
March 19, 2014 by anonymous

Chem II
Calculate the pH and percent ionization for the solution made up of 0.035 M NH3 and 0.015 M NH4Br.
April 14, 2008 by Ken

college
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. a. ) -0.77 b. ) -0.83 c. ) -0.90 d. ) -0.98 e. ) -1.01 i got c
November 1, 2008 by A.A

chemistry
The pH of a 1.00 10-3 M solution of pyrrolidine is 10.82. Calculate Kb. i keep getting anumber that is ^ (positive) and thats way to big....
February 15, 2009 by Jennifer

chemistry
calculate the volume of 0.1M NaOH which must be added to 50 mL of 0.1M HCl to give a final solution of pH 6???
March 4, 2010 by sara

chem
calculate the pH for a solution that is made by combining 125ml of 6.0*10-2 M hydroflouric aid with 50 ml of .12 M sodium flouride?
March 4, 2010 by Nikki

College chemistry
How do you 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

biochemistry
How do you calculate the PH of a buffer solution prepared by mixing 75 mL of 1.0 M lactic acid and 25 mL of 1.0 M sodium lactate?
September 18, 2010 by nicki

CHEMISTRY
calculate the number of moles of solute present in 124.0g of a solution that is 6.45% glucose by mass.
October 14, 2010 by lulu

chem
calculate the molality of a solution that has 1.02kg sucrose (C12H22O11), dissolved in 554g water.
October 27, 2010 by julia

Chemistry
Calculate the concentration of the solution in mass percent: 122 g KCl in 628 g H2O.
November 30, 2010 by Kelsey G

Chemistry (acids and bases)
Calculate pH, pOH, [H+], [OH-], and Ka for a 0.026 M solution of HI (a strong acid). Please help me :(
January 7, 2011 by Marie

chemistry
calculate the volume of water in mL needed to make 75% solution containing 50g of CaCl2
March 15, 2011 by Quinne

chemistry
Calculate the concentrations of all species present in a 0.32 M solution of ethylammonium chloride (C2H5NH3Cl).
October 16, 2011 by timothy

Chemistry 12
Calculate the pH of the solution that results when 27.38mL of 0.15M H2SO4(aq) is mixed with 18.50mL of 0.19M Ca(OH)2 (aq)
October 17, 2011 by Anonymous

Chemistry
Calculate the pH of a 0.10 M NaHX salt solution. Ka (H2X) = 2.1 x 10-2 Ka (HX-) = 4.5 x 10-8 Can someone explain the steps to do this please?
October 21, 2011 by ellen

chemistry
Calculate the normal freezing point of an aqueous solution containing 30% w/w ethylene glycol. Thanks
October 26, 2011 by el

chemistry
Calculate the pH of a solution made with 0.0600 M carbonic acid, H2C03 and 0.0300 M NaHCO3.
November 8, 2011 by Jessica

Laboratory Techniques
Calculate the number of moles K2CO3 of and MgCl2 in the 15 ml aliquots of reagent solution
November 14, 2011 by Chemistry

chemistry
Calculate the percent by mass of the solute in each of the following aqueous solutions. (a) 5.10 g of NaBr in 78.2 g of solution
April 26, 2012 by katiy

chemistry
how to calculate molar concentration of a 500 millimeter solution that contains 20 gram of CaBr2 ?
June 3, 2012 by star

Chemistry
Calculate the molarity and normality of a solution containing 9.8 g of H2SO4 on 250 cm cube of the solutiom
June 29, 2012 by Shafket

chemistry
calculate the percent by mass of solute in solution that contains 3.85 g of calcium chloride in 78.5g of water
February 21, 2013 by Anonymous

chemistry
a solution contain 0.50M propionic acid and 0.20M sodium propionate calculate ph? ka=1.3 10^-3
March 2, 2013 by kanks

chem
Calculate [OH- ] and pH for each of the following strong base solutions. (Kw = 1.0 10-14.) 3.155 g of KOH in 460.0 mL of solution] how do you do this
March 3, 2013 by hannah

Chemistry
Calculate the pH of a solution created by adding 5.00g of LiF to 150.0mL of 1.25M HF. Ka = 7.2 x 10-4
March 7, 2013 by A

Chemistry
Calculate the pH of a solution formed by mixing 124.8 mL of 0.481 M KF and 130.7 mL of 0.084 M HClO3.
March 13, 2013 by Margaret

Chemistry
Calculate the pH of a buffer solution containing 1.0 M ammonia (NH3 ; Kb = 1.8 x 10-5) and 1.0 M ammonium chloride (NH4Cl).
March 20, 2013 by Nick

Chemistry
calculate the volume of 1.07M phosphoric acid solution necessary to react with 22.9 ml of 0.150M Mg(OH)
May 1, 2013 by Juan

physical science
calculate the number of moles of H2SO4 wich were added to the NaOH solution
September 30, 2013 by gill

chemistry
Calculate the pH of a 3.0010-4 M solution of the strong acid HClO4. Round your answer to 3 significant digits.
October 10, 2013 by HELP ASAP PLEASE

chemistry
calculate the mass percent of a solution that is prepared by adding 62.3g of NaOH to 343g of H2O?
October 16, 2013 by lima

science
Calculate the mass% of different element present in H2SO4. Also show the solution.
June 13, 2014 by Ragini

Chemistry
Calculate the value (calories) for the heat of solution. Mass of NaOH: 2.03 g ΔT for reaction A : 8 C
October 24, 2014 by Maria

Chemistry
Calculate the molar H3O and ClO3 concentrations of a .28 M solution of perchloric acid (HClO3)?
November 19, 2014 by Leroy

Chemistry
Calculate the freezing and boiling points of a solution containing 14.9g FeCl3 in 176g water.
December 11, 2014 by Kate

CHM
How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol. Need the formula to understand how to continue with more problems.
November 19, 2012 by V

chemistry
How many milliliters of a 0.5 molar HCl solution are needed to react completely with 15 grams of zinc according to the following equation? ? HCl+? Zn→? ZnCl2 +? H2 Answer in units of mL
October 28, 2013 by Anonymous

chemistry
How many milliliters of a 0.5 molar HCl solution are needed to react completely with 15 grams of zinc according to the following equation? ? HCl+? Zn→? ZnCl2 +? H2 Answer in units of mL
October 28, 2013 by Anonymous

chem
what is a liquid solution and a gaseous solution? [define plz] liquid solution: sea water gas solution: air i don't need examples. i need definitions. they are not in my book. a liquid solution is a mixture of atoms/ions/chemicals, etc. dissolved in water. For example sea ...
May 15, 2007 by revie

chemistry
A solution of ferrous sulfate (FeSO4) is titrated with a solution of potassium permanganate in sulfuric acid. The balanced half reactions are as follows: 10FeSO4 + 5 H2SO4 --> 5 Fe2(SO4)3 + 10 H ^+ +10e^- and 2 KMnO4 + # H2SO4 +10e^- --> 2 MnO4 + K2SO4 + 8 H2O. The gram...
January 5, 2010 by amy

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 thats what I got thanks in advance for your ...
March 21, 2007 by Jodi

chemistry
A mixture of 3.00 g of silver and copper metals was dissolved in excess nitric acid. Resulting salts, silver(I) nitrate and copper(II) nitrate, were isolated and dissolved in enough water to make 0.100 L of a solution with a total concentration of the nitrate ion equal to 0....
September 29, 2014 by al

Chemistry
A student was given 100mL of HCL solution in a 250mL beaker and told that the HCL was 0.11M. The student was also given phenolphthalein indicator and 250 ML of 0.1234 M NaOH. The student first filled a buret with NaOH solution. The student then placed an appropriate volume of ...
November 21, 2013 by Lenny

chemistry
the solubility of Ag3PO4 (in water) is 6.7 x 10^-3 g/L. what is the molar solubility>
November 29, 2010 by AJ

Chemistry
What is the difference between solubility and solubility curve?
March 5, 2014 by Abhishek

college
Osmosis and diffusion lab five eggs weighing 50 grams each have soaked in 30% surcose solution for 24 hours. One egg is then placed in 100 millitiers of each of the following sucrose solutions: 15%, 25%, 30%, 40%, 50%. Every ten minutes the eggs are removed and weighed. Create...
March 21, 2009 by saleem

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