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July 29, 2014

Search: A 500 mL saturated solution of calcium fluoride at 25C is evaporated to dryness, yielding 8.00 x 10-3 grams of solid CaF2. What is the Ksp of CaF2 at 25C?

Number of results: 23,150

chemistry
From the jewelry descriptions given, select the homogeneous mixture or solution. Answer?? 10 carat (K) electroplated gold jewelry 24 carat (K) gold jewelry (i know this is pure gold) 18 carat (K) gold jewelry Are these right? CaCl2>>calcium chloride NaF>>>sodium...
January 28, 2013 by Lucky

Chemistry
From the jewelry descriptions given, select the homogeneous mixture or solution. Answer?? 10 carat (K) electroplated gold jewelry 24 carat (K) gold jewelry (i know this is pure gold) 18 carat (K) gold jewelry Are these right? CaCl2>>calcium chloride NaF>>>sodium...
January 28, 2013 by Lucky

chemistry
a 275mL sample of vapor in equilibrium with 1-propylamine at 25C is removed and dissolved in 0.500L of H20. For 1-propalamine, Kb=3.72*10^-4 and the vapor pressure at 25C is 215 torr. (a)What should be the pH of the aqueous solution? (b) How many mg of NaOH dissolved in 0....
March 22, 2011 by kate

Chemistery
An aqueous solution of calcium chloride contains 2 g of calcium chloride (molar mass 110.98 g mol-1) in 100 ml. Calculate the concentration of chloride ion in the solution any help their
January 20, 2009 by Slaysliver

science
how do you do this question An aqueous solution of calcium chloride contains 2 grams of calcium chloride ( molar mass 110.98 g mol-1) in 100 ml calculate the concentration of chloride ion (Cl-) in the solution
January 22, 2009 by Slaysliver

Chemistry
A saturated Ni(OH)_2_ can be prepared by dissolving 0.239 mg of Ni(OH)_2_ in water to make 500.0 mL of solution. What is the Ksp for Ni(OH)_2_?
March 15, 2012 by Shane

chem
Which of the following is NOT true about the thermodynamic standard state? A. A gas is in its standard state when its pressure is 1.00 atm and its temperature is 25C. B. An aqueous solution is in its standard state at a concentration of 1.00 M. C. A pure liquid is in its ...
February 24, 2008 by Anonymous

electrochemistry
What is the anode and cathode of this problem? A chemist wishes to determine the concentration of CrO4-2 ions electrochemically. A cell is constructed consisting of saturated calomel electrode (SCE) and a silver wire coated with Ag2CrO4. The SCE is composed of mercury in ...
June 3, 2008 by Andrew

chemistry
how much calcium is htere in 2.30 L of 0.0450 M calcium hydroxide solution ? pdf
February 6, 2012 by ashishs

chemistry
how much calcium is there in 2.30 L of 0.0450 M calcium hydroxide solution ? pdf
February 6, 2012 by ashishs

chemistry
How do I make a 6M NaOH solution? (25mL) and is there a certain way to make NaCl saturated? or is it already saturated?
January 19, 2008 by Alex

Chemistry Lab
A student who is performing this experiment pours an 8.50mL sample of saturated borax solution into a 10mL graduated cylinder after the borax has cooled to a certain temperature, T. The student rinses the sample into a small beaker using distilled water, and then titrates the ...
March 13, 2013 by ConfusedStudent

chemistry
Which of the following is NOT true about the thermodynamic standard state? A. A gas is in its standard state when its pressure is 1.00 atm and its temperature is 25C . B. An aqueous solution is in its standard state at a concentration of 1.00 M. C. A solid is in its standard ...
February 20, 2008 by jina

Chemsitry
Which of the following is NOT true about the thermodynamic standard state? A. A solid is in its standard state when the atmospheric pressure is 1.00 atm and the temperature is 25C. B. An aqueous solution is in its standard state at a concentration of 1.00 M. C. A gas is in ...
February 25, 2008 by Anonymous

chemistry
Which of the following is NOT true about the thermodynamic standard state? A. A pure liquid is in its standard state at 25C and a vapor pressure of 1.00 atm. B. An aqueous solution is in its standard state at a concentration of 1.00 M. C. A gas is in its standard state when ...
May 17, 2009 by jeff

chem
Solid calcium hydroxide, Ca(OH)2, is dissolved in water until the pH of the solution is 10.23. What is the concentration of calcium ion [Ca 2+ ]?
February 25, 2013 by ston

Chemistry
A) Find [Zn^2+] and [Fe(CN)6 ^4-] in saturated solution of Zn2Fe(CN)6. B) Repeat the above question in 0.1 mM ZnSO4 saturated with Zn2Fe(CN)6.
October 4, 2008 by jimmy

chemistry
the compound tin(II)fluoride,or stannous fluoride,once was a common ingredient in toothpaste.It is produced according to the following reactions: Sn(s)+2HF(g)->SnF2(s)+H2(g) if 45.0 grams og HF react with Sn,how many grams of stannous fluoride are produced?
May 26, 2011 by laura

CHEMISTRY
A FALSK CONTAINS 49.8 mL OF 0.150 CALCIUM HYDROXIDE. HOW MANY MILLILITERS OF 0.500 SODIUM CARBONATE ARE REQUIRED TO REACT COMPLETELY WITH THE CALCIUM HYDROXIDE IN THE FOLLOWING REACTION? Na2CO3(aq)+ Ca(OH)2(aq)CaCO3(s)+2NaOH(aq)
October 23, 2012 by HAMZA

Chemistry
How many grams of Calcium Nitride can be produced using the calcium contained in 100 ml of a 4 Molar beryllium solution?
April 15, 2012 by momo

chemistry
A precipitate of calcium phosphate is formed when aqueous solutions of sodium phosphate and excess calcium chloride are mixed. If 100.0 mL of 1.5 M sodium phosphate solution is the limiting reactant, how many grams of calcium phosphate can be expected?
September 3, 2010 by Ethan

chemistry
When varsol and iodine in potassium iodide aqueous solution is mixed, two phases form. What are the colours in each of the 2 phases when 2ml of I2/KI aqueous solution plus 2 ml of varsol are mixed in a test tube? What are the colours in each of the 2 phases when each of the ...
February 15, 2011 by Andrea

chem
When varsol and iodine in potassium iodide aqueous solution is mixed, two phases form. What are the colours in each of the 2 phases when 2ml of I2/KI aqueous solution plus 2 ml of varsol are mixed in a test tube? What are the colours in each of the 2 phases when each of the ...
March 1, 2011 by crystal

Chemistry
Which of the following is NOT true about the thermodynamic standard state? A. A solid is in its standard state when the atmospheric pressure is 1.00 atm and the temperature is 25C. B. A pure liquid is in its standard state at 25C and a vapor pressure of 1.00 atm. C. An ...
May 17, 2008 by Tom

chemistry
Determine the maximum mass of calcium iodate that can be dissolved in a 10.0L jug of 3.25x10^-2 molar calcium sulphide solution.
January 29, 2013 by Kayleigh

chemistry
if you added sulfuric acid to calcium nitrate what products in addition to calcium sulphate would you get if any ? if you start with calcium nitrate mixed into H2SO4 (aq), wouldn't you get a solution of nitric acid? H2SO4 + Ca(NO3)2 >>> 2 HNO3(aq) + CaSO4(s)
August 13, 2007 by walter

Chemistry Help Please :)
I'm stuck on how to do these 4 problems concerning Chemical Equilibriums. When varsol and iodine/pottasium iodide solutions are mixed, the two phases form.. phase A (top) would be pink and phase B (bottom) would be brown. What are the colours in each phases for these 4 ...
February 12, 2012 by Alexis

Chemistry
Describe the process by which adding potassium hydroxide to a saturated aluminum hydroxide solution reduces the concentration of aluminum ions. Write the solubility equilibrium equation and solubility product constant expression for a saturated aqueous solution of aluminum ...
May 18, 2010 by Alex

Chemistry
A chemist wishes to determine the concentration of CrO4-2 ions electrochemically. A cell is constructed consisting of saturated calomel electrode (SCE) and a silver wire coated with Ag2CrO4. The SCE is composed of mercury in contact with a saturated solution of calomel (Hg2Cl2...
May 28, 2008 by jake

Chemistry
Use the dilution relationship (Mi x Vi = Mf x Vf) to calculate the volume of 0.500 M NaOH needed to prepare 500 mL of .250 M NaOH. This is my work ? L Solution = 500mL x (1L/1000mL) = .500L ? mol NaOH = .500 L Solution x (0.250 M NaOH/1 L Solution) = .125 mol NaOH ? L solution...
February 28, 2009 by Bob

chem
reposted again a 275mL sample of vapor in equilibrium with 1-propylamine at 25C is removed and dissolved in 0.500L of H20. For 1-propalamine, Kb=3.72*10^-4 and the vapor pressure at 25C is 215 torr. (a)What should be the pH of the aqueous solution? (b) How many mg of NaOH ...
March 22, 2011 by kate-------------------------------------

Please double check...GK or Dr.Bobb22
Hi, i actually posted this up before..please double check the answers if i got them right have to hand in on Wednesday: The Chemicals are: Baking Soda- NaHC03 Calcium Chloride- CaCl2 Bromothymol Blue - (acid base indicator) _______________________________________ What is: (a) ...
January 19, 2009 by Saira

Chemistry
If 36 g of potassium chloride are dissolved in 100mL of water at 40 C to form a saturated solution, how many grams of potassium chloride would be required to form a saturated solution in 250 mL of water at the same temperature?
May 26, 2010 by Anonymous

Chemistry
A 0.41 g sample of limestone was dissolved in HCl and all the calcium in the limestone was converted to Ca2+(aq). The solution was treated with excess ammonium oxalate, (NH4)2C2O4(aq), and it was found that 3.0 g of calcium oxalate, CaC2O4(s) was precipitated. Calculate the ...
September 20, 2012 by Bob

chemistry
A 150-mL sample of a .600-mol/L calcium nitrate solution is mixed with a 1.00L of .500-mol/L NaOH(aq). Calculate the mass of precipitate produced in this reacton.
May 18, 2012 by Lizzy

chemistry
Take a cup of water, add sugar, and stir. If the resulting solution contains sugar crystals that do not dissolve, the solution is said to be? a)an unsaturated solution b)a saturated solution c)a homogeneous solution d)none of the above Is it d - supersaturated
July 23, 2010 by Thelma

chemistry
thanks DrB I got AgCl also Could you check this problem as well? If you start with .500 moles of NaF, how many moles of CaF will form? I got .250 that is correct as far as i know i got the same thing That's correct. Your answer is right. I can only assume you worked it right. ...
January 29, 2007 by key

chemistry
A saturated solution of potassium chlorate is formed from 100 grams of water. if the saturated solution is cooled from 80 degrees celsius to 50 degrees celsius, how many grams of precipate are formed? Do you have a table that lists the solubility at 80 and 50 degrees C?
January 10, 2007 by Alexus

Chemistry
Determine if the solubility would increase, decrease, or stay the same: 1) A saturated solution of sugar water is cooled from room temp to 0 degrees Celsius. 2) A solution of ocean water with dissolved oxygen is heated from 10 degrees Celsius to 15 degrees Celsius. 3) A ...
February 19, 2013 by Margaret

math
a college lab paced two orders with a chemical supplier. the first order was for 13 bottles of calcium hydroxide solution and 4 bottles of sulfuric acid and totalled $ 487. the second order was for 6 bottles of calcium hydroxide solution and 2 bottles of sulfuric acid and ...
October 20, 2011 by patel

math
a college lab paced two orders with a chemical supplier. the first order was for 13 bottles of calcium hydroxide solution and 4 bottles of sulfuric acid and totalled $ 487. the second order was for 6 bottles of calcium hydroxide solution and 2 bottles of sulfuric acid and ...
October 20, 2011 by patel

Chemistry quick question
Ok so a quick question. I have the equation Ca3(PO4)2 --> 3Ca+2 + 2PO4-3 Sorr its confusing, int he first part the 3 4 and too are all little numbers at the bottom, for the second part the +2 and -3 are small numbers at the top to show the charges. Ok so anyways the ...
June 20, 2006 by Tracy

chem
a 275mL sample of vapor in equilibrium with 1-propylamine at 25C is removed and dissolved in 0.500L of H20. For 1-propalamine, Kb=3.72*10^-4 and the vapor pressure at 25C is 215 torr. (a)What should be the pH of the aqueous solution? (b) How many mg of NaOH dissolved in 0.500L...
March 22, 2011 by leanna

Chemistry
A solution of 100.00mL of 0.2000mol/L sodium carbonate and 200.00mL of 0.1000mol/L calcium nitrate solutions are mixed together according to the reaction: sodium carbonate + calcium nitrate→ calcium carbonate + sodium nitrate. how would you calculate the mass of calcium ...
August 20, 2012 by Walker

chemistry
A chemist wishes to determine the concentration of CrO4-2 ions electrochemically. A cell is constructed consisting of saturated calomel electrode (SCE) and a silver wire coated with Ag2CrO4. The SCE is composed of mercury in contact with a saturated solution of calomel (Hg2Cl2...
May 27, 2008 by Tom

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
List the following equilibrium solutions in order of decreasing free Ag+ concentration in mixture: 0.1M AgNO3, saturated AgCl, saturated AgBr, saturated AgI, Ah(NH3)2+, and Ag(S2O3)2 3-.
February 25, 2010 by Jake

CHEMISTRY
the correct name for the compound with the formula CaS04 IS A.]CALCIUM SULFUR OXIDE B.]CALCIUM SULFIDE C.}CALCIUM SULFATE D.}CALCIUM SULFUR TETROXIDE I will be happy to critique your thinking on this.
January 12, 2007 by Darius Graham

chemistry
a saturated solution of milk of magnesia, Mg(OH)2, has a pH of 10.5. What is the hydronium concentration of the solution? is the solution acidic or basic?
July 14, 2009 by angela

CHEMISTRY/
A student takes a 1.00 mL aliquout of 5.00*10^-4 M HCl solution and dilutes it to the mark with water in a 1000.0 mL volumetric flask. (a)What is the expected pH for the final solution at 25C? (b)What would be the expected pH if this solution were later used at a temperature ...
March 20, 2011 by TORI

chemistry
The Ksp for calcium fluoride (CaF2) is 3.9 x 10^11 at 25C. How many moles of solid NaF must be added to 1.00 L of 0.100 M CaCl2 in order to precipitate CaF2? Please help me set up this ICE table and understand how to solve this!! thank you!!
July 28, 2012 by kellie

chemistry
Will a fluoride concentration of 1.0 mg/L be soluble in a water containing 200 mg/L of calcium? This is what i found for ksp CaF2<--> Ca(2+) +2F(-) Ksp=(x)(4x^2) where x=solubility Therefore, Ksp=3.7 x 10^-11 and for Qsp I am not sure how to go on about calculating that.
October 21, 2012 by John

Chemistry
Express the concentration of a 0.0860 M aqueous solution of fluoride, F, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.
February 21, 2012 by Heather

Chemistry
Express the concentration of a 0.0900 M aqueous solution of fluoride, F, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.
July 6, 2014 by Tsomo

CHEMISTRY
A 2.800-g mineral sample was analyzed for its calcium carbonate, CaCO3, content by titrating it with hydrochloric acid (the reaction products are calcium chloride, carbon dioxide, and water). The sample required 28.48 mL of a 0.1505 M HCl solution to react completely. ...
November 28, 2010 by Anonymous

chemistry (buffer)
If 5.00 mL of 1.60 nitric acid is added to a solution of 2.00 mmol thiocyanic acid (HSCN pKa=4.00) and 4.500 mmol calcium thiocyanide, assume a soluble salt- what is teh pOG of the resultant complex solution (of total volume .350L). I worked the problem out and ended up ...
May 2, 2013 by rani

Chemistry
Name the chemical formula for each: a. Sodium hydrogen carbonate NaHCO3 b. Calcium Hypochlorite Ca(ClO)2 c. Hydrogen cyanide HCN d. Magnesium hydroxide MgOH2 3. Tin(II) fluoride SnF2 Are all of these right?
September 16, 2009 by Anonymous

Science
An aqueous solution of calcium chloride boils at 101.3. How many kilograms of calcium chloride were dissolved in 1000 g of the solvent?
January 25, 2012 by Nita

chemistry
What mass of calcium carbonate is precipitated out when 2.20 g of ammonium carbonate is added to 25.7 mL of a 4.00 M solution of calcium nitrate?
November 29, 2011 by James

chemistry
If a crystal added to an aqueous solution causes many particles to come out of the solution, the original solution was___? A: saturated. B: an emulsion. C: supersaturated. D: unsaturated
August 4, 2008 by kayla

chemistry!
an aqueous solution of calcium chloride boils at 101.3 degrees Celsius. How many kilograms of calcium chloride were dissolved in 1000.0 g of the solvent??
May 25, 2010 by Ana

Chemistry
Calculate the mass of calcium phosphate that forms when 5.50 x 10 -2 mol of solid calcium chlorate is dissolved in 600.0 mL of 1.00 x 10 -2 M lithium phosphate solution.
February 21, 2012 by Bella

Chemistry
When 20.8 g of calcium chloride, CaCl2, was dissolved in water in a calorimeter, the temperature rose from 25.0C to 37.1C. If the heat capacity of the solution and the calorimeter is 1258 J/C, what is the enthalpy change when 1 mol of calcium chloride dissolves in water? ...
October 18, 2008 by Glenna

chemistry
How many grams of calcium chloride would you dissolve in water to make a total .111 M calcium chloride solution with 200 mL final volume?
July 13, 2010 by fiath

Chemistry
calcium carbonate decomposes if heated to form calcium oxide and carbon dioxide. if 24.5 grams of calcium carbonate decompose how many moles of calcium carbonate reacted?
January 21, 2013 by Channon

chemistry
The solubility of barium nitrate at 100C is 34 g/100 g of H2O and at 0C is 5.0 g/100g of H2O. If you start with 100 g of Ba(NO3)2 and make a saturated solution in water at 100C, how much water is required? If the saturated solution is cooled to 0C, how much Ba(NO3)2 is ...
October 29, 2010 by James

Chemistry
Consider a groundwater saturated with respect to PbSO4 (Ksp= 1.7*10^-8) mixing with a groundwater saturated with respect to CaSO4 (Ksp=10^-5). Assume a 50:50 mixture between the waters such as 500mL of each water mixing to form a 1.0L solution a. What is the saturation index (...
April 8, 2014 by Me

chemistry
A 30.00mL sample of a clear saturated solution of PbI2 requires 14.7mL of a certain AgNO3 for its titration. I^-(saturated PbI2)+Ag^+(from AgNO3)--> AgI(s) What is the molarity of this AgNO3? I'm not really sure where to start.
March 16, 2012 by brad

chemistry
When .03 mol Na is added to 100g of water, the temp. of the resulting solution rises from 25C to 37.9C. If the specific heat of the solution is 4.18 J/(g C), calculate delta H for the reaction, 2Na(s) + 2H2O(l) --> 2NaOH(aq) + H2(g)
July 7, 2010 by Amanda

science
1. what weight in grams of magnesium oxide will produce from burning 96 grams of magnesium? 2. a solution containing 252g of calcium sulfate will produce from 165lbs of phosphate rocks containing 82.5 % pure calcium phosphate treated with sulfuric acid? 3. how many tons of ...
August 28, 2011 by josh

chemistry
Determine the number of moles of calcium per mole of calcium hydroxide. My answer is: Because there is only one calcium ion per mole of calcium hydroxide, the mole of calcium ion is equal to the mole of calcium hydroxide. Is this a correct justification?
October 16, 2008 by Anonymous

Chemistry
In a saturated solution of silver phosphate, the concentration of silver ion is 4.5 x 10^-4 mol/L. The Ksp of silver phosphate would be which of the following? 6.8  10-8 1.0  10-11 1.4  10-14 none of the above 1.5  10-15 In a saturated solution ...
March 12, 2010 by Bobby

chemistry (Dr.Bob222)
Do serial dilutions start out as saturated solutions?, Meaning when it starts out ppt forms, but there is a point where ppt stops forming, so when the ppt stops forming does that mean it is representing a saturated solution, and that when the ppt is not forming the solution ...
November 25, 2013 by K

College Chemistry
In this lab: we demonstrated the method of evaporation of a saturated sodium chloride solution. The following question ask: 1) why is sodium chloride chosen for the solute? 2)Suggest reasons why the following were not chosen for the solute? a)Calcium carbonate (CaCO3)= b)...
September 4, 2010 by Tim

chemistry
whats thwe correct name for the salt with the formula CaI2 A.calcium diodide B. calcium iodine C.calcium iodide D. dicalcium iodine I will be happy to critique your thinking on this. calcium diodide
January 12, 2007 by Darius Graham

Chemistry
Calcium oxide can be prepared by heating calcium metal in oxygen according to the reaction: 2Ca+ O(2) --> 2CaO. How many grams of calcium would be needed to produce 15.0 grams of calcium oxide?
May 30, 2013 by Anonymous

Ap chemistry
15 ml of .325 M NaOH is delivered into a 35 ml HObr solution of unknown concentration.The pH of the final solution is measured to be 7.48.Ka for HOBr is 2.0 * 10^-9 at 25C. Find the number of moles of OBr- and HOBr in the final solution
February 18, 2012 by Jdawg

chemistry
15ml of 0.325M NaOH is delivered into 35ml HOBr solution of unknown concentration.The pH of the final solution is 7.48. Ka for HOBr is 2.0 x 10-9at 25C. Find the number of moles of OBr- and HOBr in the final solution.
February 24, 2011 by bridget

Chemistry
What is the ionic strength, I, of a solution at 25C containing 0.002 mol/L of BaSO4 and 0.001 mol/L of BaCl2? What is the activity coefficient of Ba2+ in this solution?
April 8, 2014 by Me

chemistry
10. If the calcium oxide were obtained by the heating of calcium hydroxide, how much hydroxide would be needed to obtain the 15.0 g? 11. If the 15.0 g of calcium oxide in the above problems were allowed to react with water, what amount of calcium hydroxide would be produced? ...
December 13, 2012 by greg

Chemistry
You dissolve 5 g of calcium hydroxide in 2 liters of water. What is the molarity of the hydroxide ions in this solution? What is the molarity of the calcium ions in this solution?
February 12, 2012 by Amanda

Chemistry
Estimate the solubility of calcium fluoride, CaF2+, (a) in moles per liter and (b) in grams per liter of pure water. CaF2+(s) = Ca2+(aq)+2f-(aq)
April 22, 2014 by Shana

Chemistry
What is the pH of 1.0M Na2SO3 (aq)solution at 25C? a) 3.40 b) 6.03 c) 10.60 d) 7.96 e) 10.40 How can I get ph from only the Molarity?
April 3, 2012 by Mohamed

Chemistry
A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.9 x 10^-11 for Mg(OH)2 and Ksp = 6.0x10^-26 for Sn(OH)2. What [Sn2+] is required so that the [Mg2+] in solution will be 0.15 M?
March 26, 2011 by Nikki

Chemisty
What is the molarity of the hydrochloric acid solution used if 25mL of it reacted with excess calcium carbonate to produce 5.3g of calcium chloride? CaCo3(s) + 2HCl(aq)---> CaCl2(aq) + CO2(g) + H2O(l) I am really confused on even what this question is asking..any help would...
November 20, 2011 by Jenn

Chemistry
Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate 7.85g Ca(C2H3O2)2 (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine 0.254 M KI (c) Moles of solute in 145.6 L of 0.850 M sodium cyanide 124 mol NaCN
September 28, 2009 by Emily

Chemistry
Calculate each of the following quantities: (a) Grams of solute in 185.8 mL of 0.267 M calcium acetate 7.85g Ca(C2H3O2)2 (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine 0.254 M KI (c) Moles of solute in 145.6 L of 0.850 M sodium cyanide 124 mol NaCN
September 29, 2009 by Emily

Chem112
Compute pH of the saturated solution of La(OH)3 in ther 3x10^-5 M aqueous solution of La(NO3)3xKsp(La(OH)3).
October 3, 2011 by Dominique

chemistry
A saturated solution of kno3 at 70c is cooled to 10c. What mass of a solid of precipitate out of solution.
December 19, 2012 by Riana

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
Use Ksp to find the concentration of an ion in a saturated solution. Consider a 2.50E-3 M solution of Al2(SO4)3. (a) What [OH^-] is required to initiate precipitation of Al^3+ from the solution? (b) What [OH^-] is required to lower the [Al^3+] to 2.00E-7 M ?
July 28, 2012 by Jo

chemistry
At 20C, a solution contains 120 g of NaNO3 in 100 g of water. Is this solution saturated, unsaturated, or supersaturated?
July 14, 2011 by rocky

Chemistry
A saturated solution at 25 C contains 10g of kclo3 in 50 ml of water. At what temperature does the solution become unsaturated?
February 13, 2012 by Mingma

JHU
When excess solid Mg(OH)2 is shaken with 1.00 L of 1.2 M NH4Cl solution, the resulting saturated solution has pH = 9.30. Calculate the Ksp of Mg(OH)2
November 30, 2012 by Anzeeel

Chemistry
When excess solid Mg(OH)2 is shaken with 1.00 L of 1.2 M NH4Cl solution, the resulting saturated solution has pH = 9.30. Calculate the Ksp of Mg(OH)2
December 1, 2012 by Anzeel

chemistry
How many grams of calcium nitrate (molar mass = 164 g) would be formed if 0.500 g of calcium chloride (molar mass = 111 g) were reacted with an excess of silver nitrate (molar mass = 170. g
June 30, 2014 by Anonymous

Gen Chem
Ok, how about this one? A solution contains ammonium ions and calcium along with some anions, how would you separate the ammonium ions from the calcium??
April 11, 2010 by Alex

CHEMISTRY
The solubility of KClO3 in 25 oC is 10 g solute per 100 g water if 15 g of KClO3 is embedded in 100 g water in 25 oC , then , what is the amount of KClO3 that can be dissolved ? is the solution unsaturated , saturated , or super saturated ? thank you
July 12, 2014 by MAD

Chemistry
Is the molarity of a KI solution constant when heated from 25C to 85C?
March 18, 2011 by terry

math
How many gram ofsodiun fluoride should be added to 100000liter of drinking water containing 0.6 ppm of sodium fluoride to provide a recommended concentration of 1.75 ppm
June 23, 2014 by sara

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