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July 6, 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: 65,896

Science
If You Heated 100 Grams Of Powdered Mercuric Oxide To Produce 93 Grams Of Liquid Mercury How Much Oxygen Would Be Released
November 10, 2014 by Sarah

College Chemistry II
What is the solubility of ZnCO3 at 25C in a buffer solution with a pH of 10.21? ZnCO3 <----> Zn++ + CO3 - CO3-- + H2O ----> HCO3- + OH- pOH = 14 10.21 = 3.79 [OH-] = 1.62x10^-4 M = [CO3--] = [Zn++] Ksp = [Zn++][CO3-] = (1.62x10^-4)( 1.62x10^-4) = 2.63x10^-8 when i...
August 10, 2014 by Monica

Chemistry I
In determining the heat capacity of a calorimeter, 50ml of water at 56*C is added to 50ml of water at 23*C. After about five minutes of mixing, the final temperature of the solution inside the calorimeter reached 37*C. Calculate the heat capacity of the calorimeter (J/*C-...
October 22, 2012 by Josh

chem help
You need to produce a buffer solution that has a pH of 5.08. You already have a solution that contains 10 mmol (millimoles) of acetic acid. How many millimoles of acetate (the conjugate base of acetic acid) will you need to add to this solution? The of acetic acid is 4.74.
February 28, 2009 by chem

chemistry
how many moles of cao are needed to react with excess water to produce 370 grams of calcium hydroxide
December 22, 2014 by Anonymous

Chemistry
The pH of an 0.0870 M solution of weak acid A is 2.20. The pH of an 0.0830 M solution of weak acid B is 4.07. The pH of an 0.0890 M solution of weak acid C is 5.13. Identify the three acids from among those listed below (the Ka values are listed in Appendix E of your textbook...
April 12, 2013 by Maddie

chemistry
Too make a 4% solution of paraformaldehyde from a 20 % solution. C1V1=C2V2 (20)(10ml)= (4)(x) x= 50ml so I would need to add 45ml of PBS and 4ml of the paraformaldhyde. Is that right.
September 9, 2007 by Tanya

Social Studies
What is a possible solution of ending the 1850s crisis? A solution that will address the failures of Congressional/Executive leadership, legislation and subsequent public reaction.
May 21, 2009 by micheala

Chem
If you had a 5.55 M solution of NaCL that has a density of 1.025g/ml at 20C, what would the concentration be of the solution in molarity.I got .541 m am I right or my calculation totally off?
August 25, 2009 by Sammy

chem
Suppose a solution contains a concentration of 1.0x10^-4M PbSO4 (Ksp=1.8x10^-8). Which of the following terms describes this solution? saturated , unsaturated, supersaturated, or cannot be determined
January 4, 2010 by dude

Chemistry
Determine the molarity (in mol/L) of NO2− ions in solution when 9.77101 g of sodium nitrite is added to enough water to prepare 3.94102 mL of the solution.
March 2, 2011 by Colin

Chemistry
Balance these reactions using the half-reaction method Sn2+ + IO3- -> Sn4= + I- (acidic solution) CrO2 + ClO- -> CrO42- + Cl- (basic solution)
May 26, 2010 by Mary

Chem
When dissolved in an aqueous solution, which of the following salts will yield a neutral solution? Choose one answer. a. KCN b. NaHSO4 c. Na3PO4 d. AlBr3 e. MgBr2
December 3, 2010 by Stephanie

Chemistry
If each of the salts listed in A through E were dissolved in water to make a 0.1 M solution, which solution would have the lowest pH? a. NaNO2 b. NaF c. AlCl3 d. KNO3 e. Na3PO4
February 27, 2011 by Brian

algebra
the perimeter P of a square is four times the length of ones side s, or P=4s. Is (1455) a solution of this equation? If not, find a solution that uses one of the given values
November 1, 2011 by jacky

Chemistry
A complex ion, [M(OH)6]4-, is orange in solution. Which of the following ligands, when bound to the same metal might cause the solution to be blue? Cl- CN- CO F- H2O I- NH3 NO2- OH- NCS-
November 9, 2011 by Kourtney

chemistry
You have 20 mL of a 0.1 M aquesous solution of the weak base (CH3)3N (Kb = 7.4x10^-5). This solution will be titrated with 0.1 M HCl. how many mL of acid must be added to reach the equivalence point?
February 8, 2012 by laura

Chemistry
What is the concentration, in g/L, of a solution containing 0.65 mol HNO3 in 150 mL solution? Give your answer rounded to nearest whole number, followed by a space and the units.
June 13, 2012 by Sonakshi Sinha

chemistry
if 36.23mL of a standard 0.1959M NaOh solution is required to neutralize 25.00mL of H2SO4. what is the Molarity of the acid solution, balance the equation. Please help with calculation. Thank you for your help.
September 1, 2012 by kate- Please help

chemistry 11
if a solution is contanimated with a chemical that causes a larger amount of solid, opaque particles floating in the solution, would the absorbance read too high or too low, and why?
November 3, 2012 by Anna

Chemistry
A 20.0mL 0.3M HCl solution is titrated with 0.4M NaOH. What is the exact pH of the solution before titration? And what is the pH at the equivalence point?(are there any straightforward formulas to use on this kind of problem?)
March 18, 2013 by Sue

Chemistry
A 20.0mL 0.3M HCl solution is titrated with 0.4M NaOH. What is the exact pH of the solution before titration? And what is the pH at the equivalence point?(are there any straightforward formulas to use on this kind of problem?)
March 18, 2013 by Sue

Chemistry
What is the percent by volume concentration of a solution containing 300.mL of isopropyl alcohol and enough water to give 400.ml of solution?Which component is the solute and which is the solvent?
March 16, 2014 by Hannah

Biochemistry
What is the pH of a solution prepared by mixing 150 mL of 0.1M HCl with 300mL of 0.1M sodium acetate (NaOAC) and diluting the mixture of 1L? PKa of acetic acid is 4.76. and give solution
October 22, 2014 by Maina john

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

chemistry
Aqueous ammonia is commercially available at a concentration of 16.0 M. Part A How much of the concentrated solution would you use to prepare 500.0mL of a 1.30M solution?
April 13, 2015 by d

chemistry
how many liters of hydrogen gas measured at 1.05 atm and negative 25 degrees will be produced when 5.00 grams of magnesium metal is dropped into excess hydrochloric acid?
May 25, 2010 by sss

Chrmistry
How many grams of hydrogen gas be produced from the reaction of 3 g of magnesium with 4 g of hydrochloric acid. identify the limiting in excess reactants. Please help btw that's the exact question.
March 8, 2015 by Lucy

Chemistry
A solution contains naphthalene (C10H8) dissolved in hexane (C6H14) at a concentration of 15.00% naphthalene by mass. Calculate the vapor pressure at 25 ∘C of hexane above the solution. The vapor pressure of pure hexane at 25 ∘C is 151 torr. I keep getting 168 torr...
September 20, 2014 by Kaitlyn

Chemistry
In a previous experiment, 0.800 g of the green complex iron salt was placed in an Erlenmeyer flask and heated with concentrated sulfuric acid until all oxalate ion was destroyed (CO2, SO2 and H2O are formed). Ferric ion (Fe3+) remained in solution and was reduced to Fe2+ by ...
July 12, 2010 by Sam

chemistry
NH4NO3(s) NH4+(aq) + NO3−(aq) In order to measure the enthalpy change for this reaction above, 1.07 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8C and the final temperature (after the solid dissolves) is 22.4C. ...
November 16, 2012 by DeeDee

Chemistry - Solution Stoichiometry
A piece of nickel is placed in a beaker with 350 mL of copper (II) sulfate. Calculate the concentration of the copper (II) sulfate solution. Initial mass of nickel - 15.5 g Final mass of nickel - 11.4 g What do i do with the final and initial masses of nickel?
April 2, 2008 by Michelle

chem
Equal volume of a 0.02 M Zn+ solution and a 2.0M NH3 solution are mixed. Kf for [Zn(NH3)4] is 4.1*10^8. If enough sodium oxalate is added to make the solution 0.1 M in oxalate, will ZnC2O4 precipitate. Ksp ZnC2O4= 2.7*10^-8. I set up an ICE table which have me: Kf= (Zn(NH3)4...
August 10, 2009 by Sara

Chemistry
A solution of the primary standard potassium hydrogen phthalate, KHC8H4O4, was prepared by dissolving 0.4877 g of potassium hydrogen phthalate in about 50 mL of water. Titration with a KOH solution required 36.21 mL to reach a phenolphthalein end point. What is the molarity of...
October 3, 2012 by amanda1012

Chemistry
24) It was found that a 20.00 mL portion of a solution of oxalic acid, H2C2O4, requires 6.69 mL of 0.200 M K2Cr2O7 for complete reaction in an acidic solution. In the reaction, the oxidation product is CO2 and the reduction product is Cr3+. How many milliliters of 0.450 M NaOH...
July 1, 2014 by Luke

Calc
Rope and wire are arranged in the shape of a rectangle. Two parallel sides of the rectangle are made from the rope which costs $2.00 per foot. The other two sides are made from the wire which costs $3.00 per foot. Find the dimensions of the rectangle enclosing the most area ...
December 2, 2014 by Robot

Chemistry
37. Write a balanced equation for this: Magnesium + Chlorine ---> Magnesium Chloride 40. How many torr equal 760 mm Hg? Please explain how to do these. Thanks -MC
October 26, 2010 by mysterychicken

chemistry
A 20.2g chunk of magnesium metal reacts with 13.7 g of oxygen gas to make magnesium oxide. Write the balance equation.
February 9, 2011 by Kim

macro economics
Suppose that the residents of Veggieland spend all of their income on cauliflower, broccoli, and carrots. In 1998 they buy 100 heads of cauliflower for $200,50 bunches of broccoli for $75, and 500 carrots for $50. In 1999 they buy 75 heads of cauliflower for $225,80 bunches of...
September 26, 2006 by shelby

chemistry
The solubility of silver chloride can be increased by dissolving it in a solution containing ammonia. AgCl (s) Ag+ (aq) + Cl- (aq) K1 = 1.6 x 10-10 Ag+ (aq) + 2NH3 (aq) Ag(NH3)2+ (aq) K2 = 1.5 x 107 What is the value of the equilibrium constant for the overall reaction? AgCl (...
July 21, 2012 by ken

chemistry
List the balanced net ionic equations for all reactions that you observed in this experiment. Use your observations to provide evidence for all successful reactions completed and products formed. Where applicable, list ions in their coordination complex form; for example, when...
October 23, 2012 by gine

Chemistry
Approximately 1.5 10-3 g of iron(II) hydroxide, Fe(OH)2(s) dissolves per liter of water at 18C. Calculate Ksp for Fe(OH)2(s) at this temperature. This is what I've done: 1.5x10^-3 g Fe(OH)2/L x 1mol Fe(OH)2/89.863g Fe(OH)2 = 1.669x10^-5 M Fe(OH)2 Fe(OH)2 = Fe + 2OH Ksp = [Fe...
May 25, 2010 by Jakob

chem 211
When 20.0 mL of 0.535 M H2SO4 is added to 20.0 mL of 1.07 M KOH in a coffee-cup calorimeter at 23.50C, the temperature rises to 30.17C. Calculate H of this reaction per mole of H2SO4 and KOH reacted. (Assume that the total volume is the sum of the individual volumes and that...
October 18, 2013 by beti

chemistry
I am trying to answer a bunch of lab questions about a lab I did and am stuck on finding the morality of the diluted vinegar solution? Can anyone help me? (I hope I gave enough info) Here where the lab procedures that I already went through: Transfer 10mls (Vc)of vinegar to a ...
June 12, 2009 by Gweedo8

chem
The pH of saturated Sr(OH)2 is found to be 13.12. A 15.0ml sample of saturated Sr(OH)2 is diluted to 250.0ml in a volumetric flask. A 15.0ml sample of the diluted Sr(OH)2 is transferred to a beaker, and some water is added. The resulting solution requires 29.3ml of a HCl ...
April 2, 2009 by tomi

physical chemistry
A solution is prepared by adding 1g of sugar mannitol (MW 182.2g/g-mole) in 100g of water at 20◦C. (a) Assuming that mannitol and water form an ideal solution, what is the equilibrium vapor pressure of solution? The vapor pressure of pure water is 17.54mmHg at 20◦C
December 3, 2014 by JP

Biology
How many grams of the molecule in the figure above would be required to make 1 L of a 0.5 M solution of the molecule? H O | || (looks like C=O on the vertical) H-C-C-O-H | H a.29 b.30 c.60 d.150 e.342
December 11, 2008 by Emma

Chemistryy
what mass of silver nitrate (AgNO3) is required to prepare 400 grams of a 3.50% solution of AgNO3? Options: 1. 0.00875 g 2. 114.28 g 3. 1400 g 4. 14 g
July 13, 2010 by alexandra

chemistry
You wish to prepare a 10% CaCl2 solution. Only CaCl2 * 10H2O is availalbe. How many grams of the hydrated compound are required for 250ml of the reagent? Ca=40 Cl=35.5
September 5, 2010 by j

Chemistry
How many grams of sucrose (C12H22O11) must be dissolved in 200 g water to make a solution in which the mole fraction of sucrose is 0.2? Answer in units of g.
October 11, 2010 by Mike

Chemistry
How many grams of sucrose (C12H22O11) must be dissolved in 200 g water to make a solution in which the mole fraction of sucrose is 0.2? Answer in units of g.
October 11, 2010 by May (PLEASE HELP)

CHM formula needed, pls?
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.
November 19, 2012 by Vc

chemistry
How many grams of kmn04 are contained in 35ml of 0.05N kmn04 used in the following reaction in basic solution. the answer 0.0922g who helps
February 9, 2013 by Fai

chemistry
How many grams of copper will be deposited at the cathode of an electrolytic cell if a current of 680.0 mA is run through a 2.5 M solution of copper sulfate for 20.0 minutes?
May 5, 2014 by bekah

Chemistry
How many grams of CaCl2 are needed to make 100ml of a 15% solution in water if only the dihydrated (CaCl2⋅2 H2O) salt is available?
May 18, 2014 by Yue

chemistry
How many grams of Cu (s) are needed to form 6.00g Ag from a solution of AgNO3? The reaction is Cu (s)+2Ag^+(ag)--> Cu^2+(aq)+2Ag (s) the molar masses are: Ag=107.868 and Cu=63.546g
September 14, 2014 by darya

chemistry
When 0.25M (Molarity) aqueous solutions of ammonium chloride and lead (II) nitrate are mixed a precipitate forms. How many grams of solid would be produced by mixing 250 mL of each solution?
January 5, 2011 by Palak

Biology
how would i find the osmotic pressure of something from "0.9% NaCl solution and MW is 58 grams" .. ? is there a formula or some sort i am missing? if so can you tell me what that is cause i have several problems like these that i don't know how to solve
April 8, 2014 by Amber

BIOLOGY
how would i find the osmotic pressure of something from "0.9% NaCl solution and MW is 58 grams" .. ? is there a formula or some sort i am missing? if so can you tell me what that is cause i have several problems like these that i don't know how to solve
April 8, 2014 by Amber

Chemistry 1150
Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: NH4NO3(s)→NH+4(aq)+NO...
February 25, 2014 by Smith

Chemistry
Henry constant for the dissolving of nitrogen in water was reported as 7e-4 mol/Latm at 20 deg Celsius. What is the value of the equilibrium constant, K, at 20 deg Celsius for the process N2(g0)=N2(aq). If the amount of nitrogen in aqueous solution is .1 mol N2 and the partial...
January 31, 2014 by Anonymous

Chemistry
Henry constant for the dissolving of nitrogen in water was reported as 7e-4 mol/Latm at 20 deg Celsius. What is the value of the equilibrium constant, K, at 20 deg Celsius for the process N2(g0)=N2(aq). If the amount of nitrogen in aqueous solution is .1 mol N2 and the partial...
February 3, 2014 by Anonymous-PLEASE HELP!!

chemistry
formic acid is a weak acid with a ka value of 1.8x10^-4 at 25 celsius a solution with a concentration of .424M formic acid is prepared in a laboratory. 1) Write the ionization equation for an aqeous solution of formic acid 2)determine the ph of the solution prepared above. i ...
February 12, 2015 by zack

math
Decide whether the each equation has one solution, no solutions,or infinitely many solutions. 1. 2(x-3)= 2X A.One solution B.No solutions C.Infinitely many solutions 2. 3(y-3)= 2y-9+y A.One solution B.No solutions C.Infinitely many solutions 3. 10x-2-6x = 3x-2+x A.One solution...
December 17, 2014 by jake

CHEM !(MOLE) PLZ HELP!
1.How many grams are in one mole silicon? 2. how many moles are in 128 grams of oxygen gas (O2)? 3.How many molecules are in 2 moles of AIO? 4.How many moles are in 18.06 x 10 to the 23 power? 5. how many moles are in 100 grams of CH4?
December 6, 2012 by tyneisha

(cont'd) Creating a Budget - HSM 220
Operating Expenses RENT Per Year $125,000 UTILITIES Per Year $100,000 OFFICE SUPPLIES Per Year $25,000 EQUIP/LEASE $50,000 TRANSPTN/TRAVEL $100,000 OUTSIDE CONSULTANTS $100,000 OVERHEAD COSTS $100,000 Peronal Expenses EXEC DIRECTOR Annl Sal $100,000 1-FTEs TRAINING SUPERVSR ...
October 10, 2008 by Lucille

Chemistry
How do you calculate the pH, pOH, [H3O] and [OH] for a 0.067 M solution of sodium iodate
April 14, 2008 by LT

Chem II
Calculate the pH of the solution made by mixing 35.0 mL of 0.500 M ca(OH)2 with 45.0 mL of 0.710 MHCl
April 16, 2008 by Ken

Chemistry
i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there?
February 15, 2009 by Lindsey

Chemistry
Calculate the Ph of an aqueous solution that is 3.00% KOH, by mass, and has a density of 1.0242 g/ml.
August 5, 2009 by Anonymous

metro
Calculate the pH of the buffer solution that results when 10 mL of 0.10 M NaH2PO4 is added to 3 mL of 0.05 M NaOH.
March 17, 2010 by pat

science
Calculate the molarity of 500. mL of solution containing 21.1 g of potassium iodide
October 12, 2010 by kate

chemistry
Calculate the H+ concentration (M) of a 0.010 M solution of NH4Cl. Note that the Kb for NH3 is 1.8 e-5.
November 28, 2010 by cs

Chemistry
Calculate the concentration of the solution in mass percent: 9.95 g C2H6O in 65.1 g H2O.
November 30, 2010 by Kelsey G

chemistry
Calculate the pH of a 0.800 M NaCH3CO2 solution. Ka for acetic acid, CH3CO2H, is
January 16, 2011 by noel

chemistry
Calculate the pH of a solution resulting from the addition of 10.0 mL of 0.10 M NaOH to 50.0 mL of 0.10 M benzoic acid (Ka = 6.5 x 10 -5
March 15, 2011 by haley

chemistry
How do I calculate 50ml of a 50mM sodium momophosphate buffer solution
March 23, 2011 by PAUL

chem 150
calculate the molarity of 700grams of NaOH in 2 liters of solution
June 22, 2011 by nick

gp school
calculate the molarity of a solution when 5g of urea is dissolved in 600ml of water
August 20, 2011 by shiksha

Chemistry
Calculate the pH of 0.0115M acetic acid solution at 25 degrees celcius with Ka=1.75*10^-5
September 23, 2011 by Gift

chemistry
Calculate [H3O ], [ClO4], and [OH] in an aqueous solution that is 0.130 M in HClO4(aq) at 25 C.
October 20, 2011 by Sevy

Chemistry
Calculate the pH of a solution made with 0.240 M H3PO3 and 0.480 M NaH2PO3.
November 8, 2011 by Jessica

chemistry
Calculate the pH of an aqueous solution containing 1.6 x 10-2 M HCl, 2.0 x 10-2 M H2SO4, and 1.8 x 10-2 M HCN.
November 19, 2011 by alyssa

chemistry
Calculate the molarity of a 295 mL solution contain 45 g of ethanol (C2H5OH)
November 27, 2011 by jane

chemistry
calculate the freezing point of a .05500 m aqueous solution of NaNO3
February 12, 2012 by Cece

chemestry
Calculate [OH^ - ] for strong base solution: 14.0 mL of 1.2010−2 M Ca(OH)_2 diluted to 430.0 mL.
February 22, 2012 by chris

chemistry
Calculate pH for strong base solution: 15.0 mL of 1.2010^−2 M Ca(OH)2 diluted to 460.0 mL
February 26, 2012 by jeff

Chemistry
Calculate the pH of an aqueous solution containing 3.8 10-2 M HCl, 1.0 10-2 M H2SO4, and 3.3 10-2 M HCN.
February 28, 2012 by Brooke

Chemistry
Calculate the pH of an aqueous solution containing 3.8 10-2 M HCl, 1.0 10-2 M H2SO4, and 3.3 10-2 M HCN.
March 5, 2012 by Ashley

Chemistry
Calculate the [H+] in a solution containing 1.00 M hydroflouris acid (Ka=7.2 x 10^-4) and .50 M sodium fluoride
April 6, 2012 by Hannah

Chemistry
Calculate the mass of each compound containd in 60g of a 4.5%m/m CaCl2(aq)solution
April 27, 2012 by Victoria

Science
Calculate the pH of an aqueous solution containing 1.3 * 10^-2 M HCl, 3.0 * 10^-2 M H2SO4, and 2.0 * 10^-2 M HCN.
July 24, 2012 by Will Coppock

Chemistry
Calculate the H+ ion concentration if 0.20M NH3 solution is 2.5% ionized.
September 12, 2012 by charley

analytical chemisty
Calculate the pH and pOH of a 0.00002M solution of acetic acid.
September 23, 2012 by mary

chemisty 2
Calculate the molarity (M) of a solution if you have 0.34 mol of NaOH in 19 ml of water
October 23, 2012 by chris

chemistry
calculate the mass of naso4 needed to prepare of 0.5L of 0.15M of solution
November 14, 2012 by elissa

Chemistry 1115
How do you calculate the molarities of HC2H3O2 and NaC2H3O2 in a buffer solution?
November 25, 2012 by Marci

Chemistry
Calculate the volume of 0.3MHCL used to neutralise NaOH solution
March 25, 2013 by Chris

Chem
Calculate [H3O ], [ClO4], and [OH] in an aqueous solution that is 0.170 M in HClO4(aq) at 25 C.
March 27, 2013 by Chris

Chemistry 12
Calculate the mass of K2CRO4 needed to make 3.00 L of a 0.0200 M solution.
October 8, 2013 by Riann

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