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May 6, 2016

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: 36,930

chemistry
When 26 mL of a 120 mL stock solution containing 3.23 M CaF2 is diluted to 35 mL, how many moles of F- are in the new solution
February 16, 2012 by Becca

Chemistry
Question: When 1.97 grams of Pb(OH)2(s) is added to 1.00 liter of pure water at 25 C a saturated solution (some solid is present) is formed that has a pH of 8.97. Compute the Ksp value for Pb(OH)2 using the data. How do i go about getting the Molarity from the grams given and ...
May 11, 2009 by Eliz

chemistry
a 205 mg sample of diprotic acid is dissolved in enough water to make 250 ml of solution. The pH of this solution is 2.15. A saturated solution of calcium hyrdoxide (Ksp=1.3*10^-6) is prepared by adding excess calcium hydroxide to water and then removing the undissovled solid ...
March 4, 2012 by cat

Chemistry
A saturated solution of calcium chromate (CaCrO4) freezes at -0.10 C. What is Ksp for CaCrO4? Assume complete dissociation. The density of the solution is 1.0 g/mL.
November 12, 2013 by Olivia

Chemistry
Using G (measure of free energy) to determine wether the reaction 4Fe(s)+3O2(g)-> 2Fe2O3(s) is spontaneous at 25C, given that H=.393kcal and S=-0.13 kcal/(mol*K). Is the reaction more or less spontaneous at 1000C assuming that H and S remain constant with temperature? G at ...
November 16, 2009 by Christina

Chemistry (entropy)
Calculate the Ksp of CaF2 (2 is subscript). The problem wants it calculated with all or one of the following: G = -1162 kJ/mol H = -1215 kJ/mol S = 68.87 J/mol*k The answer is 1.55*10^(-10). How do I do this?
April 24, 2008 by help please

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 I am not sure where to even begin on this problem.
March 21, 2010 by Raj

Chemistry
A water treatment plant adds fluoride ion to the water to the extent of 1.5mg F-/L H2O. a)What is the molarity of fluoride ion in this water? b)If the fluoride ion in the water is supplied by calcium fluoride, what mass of calcium fluoride is present in 1.00 x 10^6 L of this ...
October 13, 2015 by Faith

chemistry
What is the solubility of CaF2 in a buffer solution containing .30 M HCHO2 and .20 M NaCHO2?
April 4, 2010 by Kelley

chemistry
How much heat energy is given off when one kilogram of hydrogen gas at 25C and one atmosphere is combined with enough oxygen gas to make liquid water at 25C?
March 23, 2012 by Kevin

Chemistry
A hospital glucose solution is analyzed to verify its concentration. A 10.0 mL sample with a mass of 10.886 is evaporated to dryness. If the solid glucose residue has a mass of 0.648, what is the m/m% concentration?
April 8, 2013 by Linzy

Chemistry
Which of the following solution has greater density? 1. 100ml of saturated aqueous solution of Lif. (Ksp(Lif)=1.84*10^-3). 2. 100ml of saturated aqueous solution of Hg2F2. (Ksp(Hg2F2)=3*10^-6). (We can assume that adding the dissolved doesn't change the volume of the solution...
July 13, 2011 by qwerty

CHEM MOLES !@@!
Mole Calculation Worksheet 1) How many moles are in 15 grams of lithium? 2) How many grams are in 2.4 moles of sulfur? 3) How many moles are in 22 grams of argon? 4) How many grams are in 88.1 moles of magnesium? 5) How many moles are in 2.3 grams of phosphorus? 6) How many ...
December 16, 2014 by Theresa

Chemistry
A hospital saline solution is analyzed to confirm its concentration. A 60.0 mL sample with a mass of 50.443 g is evaporated to dryness. (a) If the solid sodium chloride residue has a mass of 0.413 g, find the mass/mass percent concentration of the NaCl solution. % (b) Find the...
March 26, 2014 by Harry

Chemistry
The fluoride ion concentration in a saturated solution of magnesium fluoride, MgF2, is 2.3 10-3 M. Calculate the value for the equilibrium constant.
May 5, 2014 by Harry

Chemistry
The concentration of fluoride ions in a saturated solution of barium fluoride is __________ M. The solubility product constant of BaF2 is ???
December 2, 2014 by Jane

chemistry
given 2C6H6+15O2->12CO2+6H2O 1. Starting with a confined volume of 4.80L and O2 with a partial pressure of 223.1 torr at 25 degrees C. C6H6 is in excess. The reaction is allowed to proceed to completion. The container is returned to 25C. Both liquid water and benzene are ...
November 13, 2012 by stacy

chemistry
given 2C6H6+15O2->12CO2+6H2O 1. Starting with a confined volume of 4.80L and O2 with a partial pressure of 223.1 torr at 25 degrees C. C6H6 is in excess. The reaction is allowed to proceed to completion. The container is returned to 25C. Both liquid water and benzene are ...
November 13, 2012 by stacy

Chemistry
Calculate the solubility (in g/L) of calcium fluoride in water at 25°C if the Ksp for is 1.5 × 10-10 .
December 2, 2014 by Robert

plz help now, chemistry
How do you write chemical formulas? For example how so you right a chemical formula for calcium fuoride? Calcium flouride would be CaF2 This is because .. Calcium symbol - Ca Flourine symbol - F you would write CaF BUT you must consider charges calcium has a 2+ charge and ...
December 21, 2006 by Beautiful

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

Chem
The solubility of calcium sulfate is1.90g of caso4 per liter of aquences solution at 25c. The formula weight of caso4 is 136.11 calculate the solubility product of caso4.
November 17, 2015 by Kim

Chemistry
Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?
November 18, 2012 by Kervin

Chemistry
Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?
November 18, 2012 by Kervin

Chemistry
Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?
November 18, 2012 by Kevin

Chem
Solid carbon dioxide (dry ice) goes from solid to gas at -78C. The molar heat of sublimation is 25.3 kj/mol. In one experiment 34.5g of dry ice are placed in an insulated isolated container with 500 g of water at 25C. What temp of the water is expected after all bubbles are ...
March 11, 2010 by Kelly

chemistry
For caco3 ksp 8.0 x 10-13 at 25c what is the solubility of caco3 at this temperature?
November 10, 2009 by Brandon

Chemistry
Consider the reaction CaSO4(s)rightleftharpoons Ca^2+(aq)+ SO_4^2-(aq) At 25 C the equilibrium constant is Kc = 2.4 \times 10^-5 for this reaction. If excess CaSO4(s) is mixed with water at 25C to produce a saturated solution of CaSO4, what are the equilibrium concentration of...
November 6, 2012 by Josh G.

chemistry
A ground water source contains 2.5 mg of F- ion per liter. a) what is the concentration of F- ions in moles per liter? b) will CaF2 (Ksp = 2E-10) precipitate when the concentration of Ca2+ = 5.0E-3M?
April 14, 2014 by parker

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 10-11 for Mg(OH)2 and Ksp = 6.0 10-26 for Sn(OH)2.
April 27, 2010 by Anonymous

Chemistry-Repost for DrBob222
My question was: A saturated solution of MgF2 at 23 degrees C was prepared by dissolving solid MgF2 in 1 L water. The Ksp of MgF2 is 1.5e-5. a.)Calculate the mass of MgF2 dissolved. b.) When .1 mols of solid KF was dissolved in the MgF2 solution, precipitation was observed. ...
March 21, 2014 by Anonymous

Chemistry
Hydroxylapatite, Ca10(PO4)6(OH)2, has a solubility constant of Ksp = 2.34 × 10^-59. Solid hydroxylapatite is dissolved in water to form a saturated solution. What is the concentration of Ca2 in this solution if [OH–] is somehow fixed at 5.30 × 10^-6 M?
April 4, 2013 by C

science
If you have 0.50M Ca(NO3)2 solution, how many mL of this solution must be evaporated to obtain 32.8 grams of solid Ca(NO3)2?
November 3, 2010 by Makena

Chemistry
Consider the standard cell at 25C based on the following half-reactions. Pb^2+ + 2e^- --> Pb E=-0.13V Zn^2+ + 2e^- --> Zn E=-0.76V To the standard cell, OH-, is added to the zinc compartment causing precipitation of Zn(OH)2. After precipitation is complete, the ...
May 10, 2011 by JRoussel

chemistry
need help with these problems: The concentration of glucose in blood is usually about 0.10% (w/v). If 7.0 L of blood are in an average man, how many grams of glucose are in his blood? To obtain the solute for 118 g of a 19.2% (w/w) solution of sugar we would weigh out ________...
July 20, 2010 by ellen

Chemistry
60.0 mL of O2 was collected over water at a total pressure of 755 torr and a temp of 25C. The vapor pressure of water at 25C is 24 torr. How many moles of O2 were collected? Could you please explain and show the steps? I know the answer is 2.36x10^-3.
December 11, 2013 by Chelsea

Chemistry
A 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp) for this salt is [CaC2O4=128.09 g/mol]
April 16, 2012 by Anne

Stoichometry
Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 0.55 mole of sodium carbonate is mixed with one containing 0.55 mole of silver nitrate. After the reaction is complete, the solutions ...
December 19, 2012 by Nicola

chemistry
a salt solution is evaporated to dryness. If 25.7 g of the solution leaves 1,949 mg of dry salt, what is the percent concentration (w/w) of the salt in the solution
April 29, 2012 by Randy

Chemistry
A salt solution is evaporated to dryness. If 66.5 g of the solution leaves 1,492 mg of dry salt, what is the percent concentration (w/w) of the salt in the solution?
May 6, 2013 by Marsha

Chemistry
I am translating the sentence "HF can be added to calcium carbonate to produce aqueous calcium fluoride carbon dioxide (CO2) and liquid water" into a chemical equation. I'm not sure how you write out Calcium Carbonate symbolically, or how you write clacium fluoride. Thanks for...
April 2, 2009 by Gwen

chemistry
225 mg sample of diprotic acid is dissolved in enough water to make 250mL solution.the pH of this solution is 2.06. a saturated solution of calcium hydroxide Ksp=1.6E-6 Then the saturated solution of calcium hydroxide is prepared by adding excess calcium hydroxide to pure ...
March 2, 2008 by timmathy

chemistry
A solution of PbI2 has [Pb2+] = 4.5 x 10-5 and [I-] = 6.5 x 10-4. PbI2 has Ksp = 8.7 x 10-9. Write down the reaction that is taking place. Calculate Q. Is Q larger or smaller than the Ksp? Is the solution unsaturated, saturated, or supersaturated? Will a precipitate form in ...
April 23, 2012 by Anonymous

chemistry
A solution of PbI2 has [Pb2+] = 4.5 x 10-5 and [I-] = 6.5 x 10-4. PbI2 has Ksp = 8.7 x 10-9. Write down the reaction that is taking place. Calculate Q. Is Q larger or smaller than the Ksp? Is the solution unsaturated, saturated, or supersaturated? Will a precipitate form in ...
April 24, 2012 by Anonymous

chemistry
A solution of PbI2 has [Pb2+] = 4.5 x 10-5 and [I-] = 6.5 x 10-4. PbI2 has Ksp = 8.7 x 10-9. Write down the reaction that is taking place. Calculate Q. Is Q larger or smaller than the Ksp? Is the solution unsaturated, saturated, or supersaturated? Will a precipitate form in ...
May 8, 2012 by Anonymous

Chemistry
A solution of PbI2 has [Pb2+] = 4.5 x 10-5 and [I-] = 6.5 x 10-4. PbI2 has Ksp = 8.7 x 10-9. Write down the reaction that is taking place. Calculate Q. Is Q larger or smaller than the Ksp? Is the solution unsaturated, saturated, or supersaturated? Will a precipitate form in ...
May 8, 2012 by Vanessa

College Chemistry
A 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp) for this salt is [CaC2O4=128.09 g/mol]
December 6, 2010 by Patrice

Chemistry
If a saturated solution prepared by dissolving solid BaSO4 in water has [Ba2+]= 1.04*10^5M, what is the value of Ksp for BaSO4?
February 8, 2011 by Melissa

Chemistry
Calculate the solubility of calcium sulfate in grams solute per 100 grams of solvent. Assume that the volume occupied by the solute in the solution is negligibly small. (Ksp for CaSO4 = 2.4 X 10^-5)
April 25, 2011 by Boo

Chemistry HW!!!
1. If I dilute 75 mL of 0.50 M CaF2 solution to a final volume of 375 mL, what will be the molarity of the resulting solution? 2. What will be the final volume of the solution be if I start with a 250 mL of 1.38 M MgCl2 solution to make a solution with a concentration of 0.30 ...
March 11, 2015 by Theresa

Urgent Chem Help
Question.. Nicotinic acid (niacin) is a monoprotic acid with the formula HC6H4NO2. A solution that is 0.012M in the nicotinic acid has a pH of 3.39 at 25C. what is the acid-ionization constant, Ka and pKa for this acid at 25C? Attempt.. HC6H4NO2 <----> C6H4NO2- + H+ [H...
March 15, 2009 by Saira

Plz -- Chem Help
Question.. Nicotinic acid (niacin) is a monoprotic acid with the formula HC6H4NO2. A solution that is 0.012M in the nicotinic acid has a pH of 3.39 at 25C. what is the acid-ionization constant, Ka and pKa for this acid at 25C? Attempt.. HC6H4NO2 <----> C6H4NO2- + H+ [H...
March 15, 2009 by Rushi

Chemistry
1x10-2 mol of MgSO4 (Ksp = 9) is added to 1 L of water. Will 1x10-5 mol of CaSO4 (Ksp = 10-6) completely dissolve in the solution? I think the answer is yes...because the Q will be less than Ksp of 10^-6?? Which of the following salts would you expect to result in the greatest...
March 16, 2010 by Trixie

Chemistry
I'm trying to find the solubility of Ca(OH)2 in .0125 mol/L aqueous NaOH. Here is my data: Vol of solution used per titration: 20mL Conc of HCl: .1201 mol/L Average Titre: 4.71 I need to calculte: 1. the TOTAL [OH-] in the saturated solution of Ca(OH)2 in NaOH 2. the [OH-] due...
April 14, 2010 by Kristin

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
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
Calcium chloride has been used to melt ice from roadways. Given that the saturated solution is 32% calcium chloride by mass, estimate the freezing point. Express your answer in degrees Celsius. Assume that calcium chloride behaves ideally in solution.
September 14, 2010 by Frank

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

AP Chem
Suppose I take a 1.0 L saturated, room temp solution of lead(2)bromide and dissolve 1.3g of potassium bromide in the solution. Will lead(2) bromide precipitate out? If yes how much( in grams)? If no, why not? I found the ksp for PbBr2 at room temp, and used it to find the ...
November 11, 2014 by Olivia

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 = 1.8 10-11 for Mg(OH)2 and Ksp = 5.1 10-26 for Sn(OH)2. (a) What [Sn2+] is required to start the precipitation of Sn(OH)2? (b) What [Sn2+] is required so that ...
March 14, 2013 by Gregory

Chemistry
Suppose a saturated solution of barium fluoride contains 1.5 x 10 ^ -2 M of F-. What is the Ksp of BaF2. I know that the balanced equation of this reaction is: BaF2 (s) --> Ba2+ (aq) + 2F- (aq) There is a 1:1 ratio between BaF2 and Ba2+ and there is a 1:2 ration between ...
March 31, 2016 by Grace

Chemistry
Calculate the mass of ammonia salt that would remain if the solution were evaporated to dryness. When sulfuric acid reacts with ammonia solution an ammonium salt is produced.
June 6, 2012 by Jeconiah

Chemistry
Calculate the mass of ammonia salt that would remain if the solution were evaporated to dryness. When sulfuric acid reacts with ammonia solution an ammonium salt is produced.
June 6, 2012 by Jeconiah

Chemistry
Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated? pls help me I stayed up all last night trying to get this one question :(
November 18, 2012 by Kevin pls it's due at midnight :(

soran university
1. Which salt is LEAST soluble at 0 ºC? 2. How many grams of sodium nitrate, NaNO3, are soluble in 100 g of water at 10 ºC? 3. When 50 grams of potassium chloride, KCl, is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as: A. saturated B. ...
November 24, 2014 by zagros

chemistry
How many grams of gasoline would you need to burn if you started with 275 gram piece of ice that started at -25C and by the end of the expirement had 100 grams of steam and the rest liquid water?
February 16, 2011 by reginajones

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

Math
The Spanish Club is selling churros as a fundraiser. If its goal is to raise at least $150, how many churros must it sell at$1.25 each to meet that goal? Write and solve an inequality. a. 1.25c=>150; c=>120 b. 1.25c=>150; c=>100 c. 150c=>1.25; c=>120 d. 150c...
November 10, 2015 by Kaai97

Chemistry
A sample of ca(oh)2 is allowed to stand in distilled water until a saturated solution forms. A 50.00 mL sample of this saturated solution is neutralized with 24.4 mL of 0.05 mol/L Hcl 2hcl+ ca(oh)2>cacl2+2h2o Use this information to calculate the ksp for ca(oh)2

Chemistry
In an experiment to measure the solubility of Ba(OH)2 x 8H2O in water, an excess of solid Ba(OH)2 x 8H2O was stirred with water overnight. the saturated solution was allowed to stand until all the undissolved solid had settled. a 10.00mL sample of the clear supernatant liquid ...
October 25, 2012 by Anne

Chemistry
Calculate the mass of ammonia salt that would remain if the solution were evaporated to dryness. When sulfuric acid reacts with ammonia solution an ammonium salt is produced. 2.5M * 0.025L/2=x/132 =4.125g
June 6, 2012 by Jeconiah

chemistry
A 15.0ml sample of NaCL solution has a mass of 15.78g.after the NaCL solution is evaporated to dryness, the dry salt residue has a mass of 3.26g. calculate the following concentrations for the %(m/m), % (m/v), molarity (M)
November 1, 2012 by jack

chemistry
What concentration of the barium ion,Ba^2+ ,must be exceeded to precipitate BaF2 from a solution that is 1.00*10^-2M in the fluoride ion,F-? Ksp for barium fluoride is 2.45*10^-5.
March 16, 2011 by roshan

Chemistry
Given an aqueous solution of NaCl, which of the following is the simplest method for the separation of NaCl from the solution? 1. evaporation of solution to dryness 2. filtration of solution 3. osmosis of solution 4.centrifuging the solution 5. electrolysis of solution Is it 1...
January 30, 2010 by Anonymous

Chemistry
A water sample saturated in CaF2 has Ca2+ of 115 ppm (115g Ca2+ per 10^6g water sample). What is the F- ion content of the water in ppm?
March 5, 2011 by Jenny

physics
A steel rod is 3cm in diameter at 25C. A brass ring has an interior diameter hole of 2.994cm at 25C. At what common temp will the ring just slide onto the rod? alpha(steel)- 11x10^-6 alpha(brass)= 19x10^-6
September 4, 2013 by key

chemistry
Will a fluoride concentration of 1.0 mg/L be soluble in a water containing 200 mg/L of calcium? I got Qsp 1.38 * 10^-8 and Ksp = 3.45*10^-11 does that seem right? and does this mean fluride concentration will be soluble in water containing calcium?
October 22, 2012 by John

Chemistry
What is the solubility of lead bromide at 25C? (Ksp = 4.6 x E^-6) You have used another name here but work the problem the same way I showed you for AgCl. The only difference is that PbBr2(s) ==> Pb^+2 + 2Br^- Post your work if you get stuck.
May 6, 2007 by Chem HELP

Chemistry
A certain brine has 3.96% NaCl by mass. A 75.0−mL sample weighs 76.7g How many liters of this solution should be evaporated to dryness to obtain 730kg NaCl?
September 21, 2014 by Bella

Chemistry
I am working a question...... I am not sure how to go about solving this or working it out. The class is online. Can some explain how to go about doing this. Thank you greatly :) How much heat does your body lose when 2.60g of sweat evaporates from your skin at 25C? (Assume ...
March 21, 2013 by STAT

chemistry
If we suppose that Kw = 1.0x10^-14 at 25C, would it be larger or smaller at 100C? What is the value of K for the reaction 8H + 8OH = 8H2O at 25C? Would this value be smaller, or larger, at 100C?
July 6, 2010 by Juan

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
Ammonium bisulfide, NH2HS, forms ammonia NH3, and hydrogen sulfide, H2S through the reaction: NH4HS (s) <--> NH3(g) + H2S(g) Kp value of .120 at 25C in a 5L flask is charged with .300g of H2S at 25C. A) What are the partial pressures of NH3 and H2S at equilibrium, what ...
March 11, 2012 by maura

Chemistry (Analytical)
Solve for the number of grams of Ca2+ ion in a solution prepared by adding 1.00 gram of calcium oxalate (Ksp=1.3x10^-8)powder to 100 mL at pH 9.
February 8, 2014 by Nathan Berry

Chemistry
Consider the reaction Zn(OH)2(s) + 2CN-(aq) <--> Zn(CN)2(s) + 2OH-(aq) a) Calculate K for the reaction. (Ksp Zn(CN)2= 8.0 x 10^-12) b) Will Zn(CN)2 precipitate if NaCN is added to a saturated Zn(OH)2 solution? I tried splitting this into two equations: Zn(OH)2(s)<--&...
April 11, 2007 by Kristina

Chemistry
Calculate the number of grams of solid Mg(OH)2 that will dissolve in 650 mL of water. For Mg(OH)2, Ksp = 1.5 x 10-11. Assume no volume change for the solution when the solid is added. A. 0.0093 B. 0.0059 C. 0.012 D. 0.019 E. 0.060 I got 0.0059, but I'm not sure if this is ...
December 26, 2012 by Jessica

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

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

12 chemistry
What is the average ion concentration in a 7.9 mL saturated solution of calcium hydroxide containing calcium chloride (CaCl2)?
April 24, 2007 by Erica

Chemistry
Hydroxylapatite, Ca10(PO4)6(OH)2, has a solubility constant of Ksp = 2.34 × 10-59, and dissociates according to Ca10(PO4)6(OH)2(s) --> 10Ca2+(aq) + 6PO43-(aq) + 2OH-(aq) Solid hydroxylapatite is dissolved in water to form a saturated solution. What is the concentration of ...
January 19, 2013 by Gabby

chemistry
what are the components of one formula unit of CaF2?
May 29, 2008 by jerson

College Chemistry
a 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp) for this salt is [CaC2o4= 128.09 g/mol] a) 6x10^ -3 b) 4.6x10^ -8 c) 2.3x10^ -9 d) 1.5x10^-4 if you could please work it out for me, thank you
December 2, 2010 by Shanice

Chemistry
What is the total vapor pressure of NaCl solution at 25C with mole fraction of 0.01? (X_NaCl = 0.01) Thanks!!
February 9, 2009 by Andrew

chemistry
Predict if a precipitate will form when 20.00 mL of the 50% saturated solution is mixed with 20.00 mL of 0.0100M of the following solutions.? the saturated solution is : BaCO3, it has the Ksp of 5.1 x 10^-9 the solubility is 7.1 x 10^-5 M. I don't know how to do this. I am ...
February 17, 2015 by Crystal

Chemistry
consider 2 sample of nitrogen gas. sample 1 contains 1.5 mol of N2 and has a volume of 36.7L at 25C and 1 atm. sample 2 has a volume of 16.5L at 25C and 1 atm. calculate the number of moles of N2 in sample 2 do i use the pv= nrt equation? and do i only use the information ...
June 8, 2010 by Anonymous

Chem
Plese tell me if these are right. A 15.0-mL sample of NaCl solution has a mass of 15.78g. After the NaCl is evaporated to dryness, the dry salt residue has a mass of 3.26g. Calculate the following concentrations for the NaCl solution. a. %(m/m)= 3.26 x 100 / 15.78 = 20.7 b. %(...
November 7, 2010 by Jason

chemistry
Questions 7-9 refer to the following substances. (A) H2 (B) CH3OH (C) CH2Cl2 (D) KCl (E) Co 7. Is a solid at 25C and 1 atm 8. Is capable of hydrogen bonding 9. Its properties are governed by London(dispersion) forces.
February 10, 2010 by chuchuchulu

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

Chemistry
Suppose we are dealing with calcium chloride as opposed to the chemical in the video. If a solution contains 70 g of calcium chloride per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated?
May 19, 2013 by Moise

Chemistry
Suppose we are dealing with calcium chloride as opposed to the chemical in the video. If a solution contains 70 g of calcium chloride per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated?
July 8, 2013 by Steptim