Monday
April 21, 2014

# Search: CaSO4

Number of results: 251

Chemistry
(2) Fe2(SO4)3+ Ca(OH)2-->Fe(OH)3+CaSO4
Thursday, October 25, 2007 at 7:56pm by Tyler

chemistry
Ca(s) + H2SO4(aq) ==> CaSO4(s) + H2(g)
Saturday, May 12, 2012 at 8:07pm by DrBob222

science
net ionic? Ca++ + SO4-- > CaSO4
Wednesday, March 26, 2014 at 2:39pm by bobpursley

chemistry
How many moles of H2SO4 are required to produce 100kg of CaSO4 from CaCO3
Monday, January 31, 2011 at 11:16pm by donabel

chemistry/ quantitative analysis
How many grams of CaSo4 will dissolve in 6L of water?
Sunday, May 22, 2011 at 8:52pm by rvice

chemistry/ quantitative analysis
How many grams of CaSo4 will dissolve in 6L of water?
Sunday, May 22, 2011 at 9:52pm by rvice

Chemistry
What physical properties will the ionic compound CaSO4 be expected to have?
Friday, April 27, 2012 at 10:12am by Jesse

Chemistry
How many grams of CaSO4 are present in 320ml of a 0.00810 M solution of this compound?
Thursday, August 9, 2012 at 1:29am by Jim

Science
Perhaps something here will help: http://search.yahoo.com/search?fr=mcafee&p=3+CaSO4+%2B+2+AlCl3+Al2%28SO4%293+%2B+3+CaCl2+ Sra
Thursday, December 16, 2010 at 7:06pm by SraJMcGin

chemistry
how do you balance this equation K2SO4 + Ca(NO3)2 -> CaSO4 + KNO3
Monday, February 9, 2009 at 1:51pm by peter

chemistry
the order of cation concentration of CuSO4, BaSO4, CaSO4 from highest to lowest.
Monday, January 16, 2012 at 10:56am by saphire

Chemistry - DrBob222
CaCl2 + Na2SO4 No reaction CaSO4 is not all that soluble so I might take this "no reaction" back. However, using AgNO3 to ppt AgCl still would be better. How would these give no reaction. NaCl + Zn ==> ZnCl + Na Zn is below Na in the EMF series; therefore, it will not ...
Sunday, November 11, 2007 at 8:34pm by DrBob222

chemistry
balance this stoichiometric equation: SO2 + CaCO3 + O2 ------> CaSO4 + CO2
Wednesday, July 22, 2009 at 7:33pm by maria

chemistry
I believe it comes out to CaSO4 x 2H20 20.9% 2:1 ratio I think haha
Friday, February 19, 2010 at 2:20pm by Chris

Chemistry
1. Ca(OH)2(aq) + H3PO4(aq) à Ca3(PO4)2(aq) + H2O(l) a. If you have 13.7mol of Ca(OH)2, how many grams of H2O are produced? b. How many grams of H3PO4 are required to produce 102.3g Ca3(PO4)2? c. How many moles of Ca(OH)2 are needed to produce 82.9g of Ca3(PO4)2? 2. Al2(SO4)3...
Saturday, March 26, 2011 at 3:26pm by Sulon

Chemistry
I was asked to consider the solubility for hydrated calcium sulfate in HCl. The principal acid my proffesor had posted for the solution was [ CaSO4(hyrdrated) + HCl <--> H30^+ + Ca^2+ + SO4^2- ]. I guess what I'm asking is what happened to the Cl^- and why isn't it ...
Sunday, June 17, 2007 at 8:39pm by john peterson

chemistry
What is the gram fomula mass of calcium carbonate (CaSO4)? A. 6 g B. 136.2 g C. 230.0 g D. 235.4 g think B
Saturday, November 10, 2012 at 8:57pm by Drew

chemistry
it only tells me that and that gypsum contains 2 moles of water for each 1 mole of calcium sulfate from CaSO4*2H20
Sunday, November 28, 2010 at 8:42pm by mike

SCIENCE/CHEM
when the following equation is balanced , what is the sum of the co-efficients? AL2(SO4)^3+Ca(OH)2-->Al(OH)3+CaSO4
Wednesday, May 12, 2010 at 9:11pm by Andy

chemistry
A water sample contains 102mg of CaSO4 per litre. Calculate the hardness in terms of CaCO3 equivalent.
Thursday, January 20, 2011 at 4:46am by Anonymous

science
when marble undergoes CaCO3+ H2SO4 = CaSO4+H2O+CO2, what happens to it and where can one see the evidence of this effect?
Thursday, May 5, 2011 at 5:59pm by mmm

Chemistry
I got 4.9*10^-3 M. Thanks and If the resulting solution has a volume of 1.9L , what is the minimum mass of CaSO4 (s) needed to achieve equilibrium?
Tuesday, November 6, 2012 at 1:24am by Josh G.

Chemistry
I got 4.9*10^-3 M. Thanks and If the resulting solution has a volume of 1.9L , what is the minimum mass of CaSO4 (s) needed to achieve equilibrium?
Tuesday, November 6, 2012 at 1:49am by Josh G.

chemistry
how many grams of calcium oxide are needed to produce 36.0 g of Hg. 4HgS +4CaO--> 4Hg +3CaS + CaSO4.
Sunday, June 8, 2008 at 10:48am by Miley

Chem
Go to your periodic table, and get the avg atomic mass of Ca, S, and O. Multiply O by 4, then add the constituents of CaSO4. It is somewhat less than 140
Tuesday, November 13, 2007 at 5:29am by bobpursley

chemistry
a student heated 3.48 g of a pure sample of CaSO4 2 H2O until all the water of hydration was expelled. what was the mass of the residue?
Sunday, November 25, 2012 at 8:45pm by Jules

chemistry
a student heated 3.48 g of a pure sample of CaSO4 2 H2O until all the water of hydration was expelled. what was the mass of the residue?
Sunday, November 25, 2012 at 8:45pm by Jules

Chemistry (urgent)
Ag2CrO4 ==> 2Ag + CrO4^-2 Ksp = (Ag^+)^2(CrO4^-2) What you do is let S = solubility of Ag2CrO4 in molarity. Then S is concn CrO4 and 2S = concn (2S)^2(S) = Ksp 4S^3 = Ksp Solve for S. 2S will be Ag^+, S will be Ag2CrO4 and S will be CrO4^-2. #2. Here you have two equilibria...
Monday, April 12, 2010 at 9:35pm by DrBob222

Chemistry
From my textbook, Ksp(Ag2SO4)= 1.20x10^-5 Ksp(CaSO4)= 4.93x10^-5
Friday, April 6, 2012 at 4:36pm by Jematormal91

chemistry
Tell how to make a 1 M solution of Mg3(PO4)2 and a 0.1 M solution of CaSO4.
Friday, January 25, 2013 at 3:02pm by Shannon

General Chemistry
CaSO4 Ksp= 4.93E^-5 Ag2SO4 Ksp= 1.20E^-5
Tuesday, March 18, 2014 at 10:07pm by yab0yMark94

College Chemistry
Which contains more sulfur, 35.2g CaSO4 or 35.7g NaSO4?
Saturday, June 18, 2011 at 1:00am by Sydney

chemistry
if you heat 15.00g of the hydrate CaSO4*2H20, and drive off the water, what is the weight of the anhydrous salt remaining? How do I go about solving this?
Sunday, November 8, 2009 at 9:56pm by c

chemistry
addition of a strong acid would increase the solubility of which of the following salts AgCl CaSO4 CdS CaCO3 PbBr2 CaHPO4 Cd(OH)2 AuCl
Sunday, March 13, 2011 at 9:42pm by Emily

Science, Chenistry
If you have a tank containing 10,000L of water. what weight of CaSO4.H2O must be added to math the Ca+ concentration of 130ppm
Saturday, March 24, 2012 at 12:56pm by Jenn

chemistry
Determine ΔSuniv for the following equation: Ca2+ (aq) + SO42- (aq) → CaSO4 (s)
Tuesday, April 15, 2014 at 7:15pm by Kaitlin

Chemistry lab
just gonna post my answer to see if more can be added or fixed 1. In trail one CaCl2 will react completely (limiting regent) which limits the complete reaction of NaSO4 (excess regent) therefore creating a precipitate of sulfur. In trails 2-4 as the concentrations increase the...
Monday, November 5, 2012 at 3:26pm by Tara

Science
3 CaSO4 + 2 AlCl3 Al2(SO4)3 + 3 CaCl2 How many moles of aluminum chloride are required to produce 97.0 g of calcuim chloride in the above reaction?
Thursday, December 16, 2010 at 7:06pm by Catherine

Chem.
which one of the following groups of chemical compounds is organic compound . C2H4O,CH2O,CaSO4,C3H5(OH)3, C6H6C2H5OH,C6H5CH3CC3H5(NO3)3 or is it this Ch3OCH3,Ca3(PO4)2,CO2,H2CO3
Sunday, June 7, 2009 at 6:41pm by colene

chemistry
which of the following would form acidic,basic or neutral solutions:nh4f,nh4cn,nh4ch3coo,nh4cl,ba(ch3coo)2,nacn,caso4,cr(no3)3,fecl3,na2co3
Thursday, November 11, 2010 at 9:40am by andrew

Chemsitry
Ksp = (Ca^+2)(SO4^-2) Solubility CaSO4 = S = 1.9g/136 = ??mole and that in 2L is ??/2 = (S) Then substitute the value for S into the Ka expression and solve for Ka.
Sunday, June 13, 2010 at 2:17pm by DrBob222

CHEM
What is the molarity of a calcium sulfate solution prepared by adding 27.89g of CaSo4 to sufficient water to make a final solution volume of 1.00L?
Thursday, February 7, 2013 at 9:20pm by Lisa

science
Na2SO4(aq)+CaI2(aq)→CaSO4(s)+2NaI(aq) as net ionic
Wednesday, March 26, 2014 at 2:39pm by Anonymous

chemistry
If 380. mL of 0.4294 M aqueous CaBr2 and 250. mL of 0.5880 M aqueous SO42- are reacted stoichiometrically according to the equation, how many mol of CaBr2 remained? Al2(SO4)3(aq) + 3 CaBr2(aq) → 2 AlBr3(aq) + 3 CaSO4(s) ----------------------------------------- If 270. ...
Wednesday, November 17, 2010 at 1:01am by Confused

College Chemistry
Plaster of Paris is the compound calcium sulfate hemihydrate, CaSO4*1/2H2O What mass of water is liberated when a 2.763 gram sample is heated to constant mass?
Saturday, October 8, 2011 at 1:13am by Roy

chemistry
if 0.5 moles of H2SO4 combine with 0.2 moles of CaSO4 then how many moles of Ca(OH)2 will be there?
Thursday, July 14, 2011 at 4:44am by richa

Chemistry
on heating the hydrate CaSO4*2H2O, how many moles of water should be driven off per mole of hydrate? 1 mole?
Sunday, November 8, 2009 at 9:43pm by c

Chemistry
Both calcium sulfate and magnesium sulfate can form hydrates with water. Could white anhydrous CaSO4 or MgSO4 be substituted for anhydrous CuSo4? Why or Why not?
Sunday, September 26, 2010 at 8:44pm by HELP!!!

chemistry
Monday, September 24, 2012 at 7:34pm by DrBob222

Chemistry
Hard water precipitates CaSO4 and/or CaCO3 that sticks to the bottom of the kettle; thus, a barrier is formed from the metal kettle to the water which makes it harder to transfer the heat.
Wednesday, August 18, 2010 at 3:21pm by DrBob222

Chemisty
a)What is the [Ca2+] when 100mL of .05M CaCl2 is added to 100mL of .10M K2SO4? b) What is the [SO42-] for part a? c) write the Ksp expression for CaSO4 d)Will a precipitate form in the solution from part a)?
Thursday, March 20, 2014 at 8:41pm by Katherine

Chemistry - Balancing Equations
Ca(OH) + H2SO4 -----> CaSO4 + H2O There is a typo Ca(OH)2 ; balancing is then easier. Ca(OH)2 + H2SO4 -----> CaSO4 + 2H2O 2Na2S2O3 + I2 -----> 2NaI + Na2S4O6 ZnCl + Na2S -----> ZnS + NaCl another typo here should be ZnCl2 which again make balancing easier ZnCl2 + ...
Monday, April 19, 2010 at 1:16am by Dr Russ

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)
Monday, April 25, 2011 at 10:43am by Boo

Chemistry
CaSO4 ==> Ca^+2 + 2SO4^-2 Ksp + (Ca^+2)(SO4^-2) Convert solubility in g/100mL to moles/L, substitute into Ksp expression and sole for Ksp.
Monday, November 29, 2010 at 9:07pm by DrBob222

Chemistry
Ba(NO3)2 + CaSO4 ==> BaSO4 + Ca(NO3)2 mols Ba(NO3)2 = M x L = ?. No M given in the problem.
Sunday, December 9, 2012 at 6:11pm by DrBob222

chemistry
%H2O = (mass H2O/mass CaSO4.2H2O)*100 = ? Use molar masses for H2O and gypsum.
Wednesday, February 6, 2013 at 9:44pm by DrBob222

AP Chemistry
Write the Ksp expression, calculate the moles CaCl2 and moles K2SO4. Determine which is in excess (if either), the excess one will be a common ion for the pptn of CaSO4. Post your work if you get stuck.
Wednesday, April 21, 2010 at 10:06pm by DrBob222

chemistry
Calculate the theoretical percentage of water in gypsum, rounded to the nearest whole number %. (calcium sulfate dihydrate; CaSO4 ° 2H2O; Ca = 40 g/mol, S= 32 g/mol; O= 16 g/mol; H= 1 g/mol).
Wednesday, February 6, 2013 at 9:44pm by tina

chemistry
(Ca^+2) = x from CaSO4 and 0.01 from Ca(NO3)2. (SO4^=) = x (0.01+x)(x)=7.1 x 10^-5 When you solved for x, the value of 0.0071 you have is correct; however, in relation to 0.01, it is too large. In other words, the total Ca^+2 is 0.01 + solubility of CaSO4. If the solubility (...
Tuesday, April 8, 2008 at 4:22pm by DrBob222

science
Ca3(PO4)2 + 2H2SO4 = 2CASO4 + Ca(H2PO4)2 How many moles of CaSO4 can be produced by the reaction of 0.39 moles of Ca3(PO4)2 with excess H2 SO4?
Sunday, October 24, 2010 at 3:54am by neil

Chemistry
Yes. You find the mass of Ca(H2PO4)2 and add that to the mass of CaSO4 to find the mass of the "superphosphate".
Saturday, January 8, 2011 at 10:01pm by DrBob222

Chemistry
CaSO4>> Ca++ + SO4-- Ksp= x^2 2.4E-5=x^2 x= 4.89E-3 moles/liter in grams per liter, 4.89E-3*(136)/10 = .067grams/100gH2O
Monday, April 25, 2011 at 10:43am by bobpursley

Chemistry
Just wanted to check this. Are the two half reactions for 2K+CaSO4 yields K2SO4+Ca 1K yields K^+1 + e^- and Ca^+2 + e^-2 yields Ca?
Monday, April 20, 2009 at 9:27pm by Angeline

chemistry
In 24 g of a 7.8% by mass solution of CaSO4? How many grams of solute are present gCaSO4? how many grams of solvent are present g solvent?
Thursday, December 9, 2010 at 4:55pm by Anonymous

chemistry check
What is the sum of the coefficients (including “1”) of the following reaction? Sodium sulfate + calcium hydroxide ??? Na2SO4 + Ca (OH)2 --> 2 NaOH + CaSO4 a. 4 b. 5 c. 6 d. 7 e. 9 the sum of coefficients are = 1 + 1 + 2 +1 = 5 Goodness, you add the digits well. Good work. ...
Tuesday, January 30, 2007 at 9:41am by key

chemistry
If Hf supposed to be hafnium metal, or did you mean HF? Only the hydroxides will react to form salts. The MgSO4 will precipitate out, but the CaSO4 may remain in solution until enough water is evaporated to saturate the solution. DrBob222 will correct me if I am wrong
Tuesday, December 2, 2008 at 5:18pm by drwls

gen chem
The free energy change for dissolution of CaSO4 at 25C is 28.774kJ/mole. What is the solubility of this compound. i got ksp lnK = deltaG/RT lnK= 28774/(-8.31*298) Ksp = 2.39e-12 i dont know waht to do after this..
Sunday, May 9, 2010 at 5:54pm by chemistry

chemistry
CaSO4 ==> Ca^+2 SO4^-2 Ksp = (Ca^+2)(SO4^-2) = 4.58E?? (you had better look up the Ksp because 4.58 can't possibly be correct.) You then add 5.00*10^-3 WHAT of Na2SO4. Take care of the errors in this and I'll get back to it.
Saturday, January 15, 2011 at 6:44pm by DrBob222

Chemistry
2.914-2.304 = loss in mass = mass H2O lost. %H2O = (mass H2O/mass sample)*100 = ? Note: A more interesting problem is to calculate the formula of the hydrated CaSO4 from these data.
Monday, September 24, 2012 at 10:47pm by DrBob222

chemistry
If 0.0490 mol of solid CaCO3 and 380 mL of 0.135 M aqueous H2SO4 are reacted, what volume (L) of gaseous CO2 measured at 1.1 atm pressure and 301 K is produced. H2SO4(aq) + CaCO3(s) → CO2(g) + CaSO4(s) + H2O(l)
Sunday, November 21, 2010 at 12:51am by Confused

Chemistry
Ca(OH)2 + (NH4)2SO4 --> CaSO4+ 2NH3 + ?___H2O
Monday, October 13, 2008 at 6:50pm by GK

Use the following problem to: Outline how to determine the limiting agent. Determine the excess reactant and how much is left over. Determine the amount of each of the products produced. CaSO4 + AuF3 = CaF2 + Au2(SO4)3 Start with 15 grams of each reactant.
Wednesday, January 9, 2013 at 10:07pm by Shelbie

chemistry
H2SO4 + Ca(OH)2 ==> CaSO4 + 2H2O moles H2SO4 = M x L = ?? moles Ca(OH)2 = M x L = xx Set up an ICE chart, determine which of the reactants is in excess and determine H^+ or OH^- from that, then convert to pH.
Monday, May 23, 2011 at 10:35am by DrBob222

Chemistry
Ca3(PO4)2 + 3 H2SO4 -> 3 CaSO4 + 2 H3PO4 What masses of calcium sulfate and phosphoric acid can be produced from the reaction of 1.0 kg calcium phosphate with 1.0 kg concentrated sulfuric acid (98% H2SO4 by mass)?
Monday, August 16, 2010 at 10:26pm by Anonymous

chemistry
double displacement: AB+CD>>AD+ CB(s) example: sulfuric acid+ calcium nitrate. H2SO4(aq)+Ca(NO3)2 (aq)>> CaSO4(s)+2HNO3 LImiting reactants: any reaction that doesn't have enough of one reactant.
Thursday, November 17, 2011 at 4:50pm by bobpursley

Chem
Which of the following produces a coordinate complex? H2SeO4 + 2Cl- + 2H+ --> H2SeO3 + Cl2 + H2O S8 + 8O2 --> 8SO2 3Br2 + 6OH- --> 5Br- + BrO3- + 3H2O Ca+2 + SO4-2 -->CaSO4 PtCl4 + 2Cl- --> PtCl6(-2)
Tuesday, April 22, 2008 at 10:31pm by Trevor

Science, Chenistry
in 10,000L water, that is 10E6 grams. So you must have 130ppm then 1.3kg Ca++ ion. moles Ca ion= 1300/40 now, find the weight (I assume the writer means mass) of CaSO4.H2O of that same number of moles.
Saturday, March 24, 2012 at 12:56pm by bobpursley

chemistry
write a balanced chemical equation for calcium nitate plus sulfuric acid produces calcium sulphate and ? This is a metathetical reaction, I think more properly called a double displacement reaction now. Just change + and - partners. Ca(NO3)2 + H2SO4 ==> CaSO4 + HNO3. I will...
Thursday, August 9, 2007 at 11:40am by walter

AP Chem
Consider the following unbalanced equation: Ca3(Po4)2+H2SO-->CaSO4+H3PO What masses of calcium sulfate and phosphoric acid can be produced from the reaction of 1.0 kg calcium phosphate with 1.0 kg concentrated sulfuric acid (98% H2SO4 by mass)? I'm so lost. Please help.
Tuesday, November 4, 2008 at 10:59pm by Robyn

Chemistry
......CaSO4(s) ==>Ca^2+(aq) + SO4^2-(aq) I.....solid........0............0 C.....solid........x............x E.....solid........x............x Substitute the E line of the ICE chart into Ksp expression and solve for x = (Ca^2+) = (SO4^2-).
Tuesday, November 6, 2012 at 1:24am by DrBob222

chemistry
Because I am so used to working problems with 1 L that I just read 1 L into it. Excuse me please. You are right. After you know the concn of SO4 needed to ppt CaSO4 (in 1 L), then multiply that by molar mass Na2SO4 to find grams for 1 L, then multiply by 1000 to obtain grams ...
Tuesday, July 27, 2010 at 10:32pm by DrBob222

Yes, it's correct. Another way you could have done it (but no more correct than the way you did it) is 1.994 g = hydrated CaSO4 -1.577 g = anhydrous material ----------- 0.417 g = mass water driven off %H2O = (0.417/1.944)*100 = 20.913 which I would round to 20.9%.
Friday, November 21, 2008 at 3:41pm by DrBob222

Chemistry
How can I tell if the following equations produce precipitates or not? 1. HgCl2 (aq) + K2CrO4 (aq) ==> 2. Ba(OH)2 (aq) + NaClO3 (aq) ==> 3. ZnI2 (aq) + CaSO4 (aq) ==> 4. SnCl2 (aq) + MgBr2 (aq) ==>
Thursday, January 10, 2008 at 5:07pm by Cierra

chemistry
2HNO3 + CaCO3 ==> CO2 + H2O + Ca(NO3)2 H2SO4 + CaCO3 ==> CO2 + H2O + CaSO4 You can turn them into ionic and net ionic equations.
Tuesday, October 12, 2010 at 8:30pm by DrBob222

science(chemistry) -Q for Dr.Bob
Wait, the whole problem here is to determine whether there is or there is not water in the solvent layer. Utilizing the CaSO4 to dry the layer would not tell me if there was or was not water. basically, Is there any way to determine if there is water in solvent layer?
Monday, April 20, 2009 at 11:56pm by ~christina~

Chem
Sulfuric acid, H2SO4, reacts with CaF2 according to: CaF2 + H2SO4 ---> CaSO4 + 2 HF What is the minimum amount, in g, of impure H2SO4 (which is 83.5% H2SO4 by mass) that would be required to produce 16.2 g of HF when reacted with excess CaF2 ? Could someone walk me through ...
Saturday, May 16, 2009 at 2:47pm by rory

Chemistry
Which of the following solutes, dissolved in 1000g of water, would provide a solution would the lowest freezing point? .030 mol of BaCl2, CO(NH2)2, CaSO4, CH3COOH, or .030 mol of NH4NO3 Again, the steps needed to determine for the freezing point.
Tuesday, February 19, 2013 at 5:50am by Marcus

Chemistry
which of the following compounds dissolve in water?? -Sodium Nitrate (NaNO3) - Sucrose (C12H22O11) - Sodium Chloride (NaCl) - Potassium Sulfate (K2SO4) - Ethanol (C2H5OH) - Sodium Bicarbonate (Baking Soda)(NaHCO3) - Calcium Sulfate (CaSO4) i did an experiment, but I was not ...
Friday, September 25, 2009 at 6:43pm by Liz

chem
CaSO4(s) ==> Ca^+2 + SO4^= Ksp = (Ca^+2)(SO4^=) I would calculate moles Ca^+2 and moles SO4^=, from an ICE chart you will know which is the limiting reagent and from there which is the common ion (that will be the one in excess). Then calculate the solubility and from there...
Thursday, April 23, 2009 at 5:39pm by DrBob222

chemistry
CaSO4 ==> Ca^+2 + SO4^= If ionic strength is to be neglected, and there is no acidity listed (acidity would increase the solubility due to the formation of HSO4^-) then (Ca^+2) = x+0.010, (SO4^=) = x Ksp = (Ca^+2)(SO4^=) = 2.6 x 10^-5 (x+0.01)(x) = 2.6 x 10^-5 If we call x...
Sunday, March 30, 2008 at 10:59pm by DrBob222

chemistry
This question is really for you to use your imagination and your knowledge of chemistry. I can give you a hint: Ca^2+ can be pptd by using H2SO4, for example, since CaSO4 is moderately insoluble. BUT, would you want to drink water that had been treated with an excess of H2SO4...
Sunday, April 12, 2009 at 8:31pm by DrBob222

COLLEGE CHEMISTRY
If 0.340 mol of solid CaCO3 and 410 mL of 0.829 M aqueous H2SO4 are reacted stoichiometrically according to the balanced equation, how many milliliters of 0.829 M aqueous H2SO4 remain? Round your answer to 3 significant figures. H2SO4(aq) + CaCO3(s) → CO2(g) + CaSO4(s...
Thursday, February 25, 2010 at 3:50pm by Anonymous

Chemistry
I was supposed to figure out whether the following equations produced precipitates or not. Here are my answers, but I know that they are wrong. So I still can't figure out where I'm messing up...? Please help! HgCl2 (aq) + K2CrO4 (aq) = Yes Ba(OH)2 (aq) + NaClO3 (aq) = No ZnI2...
Sunday, January 13, 2008 at 1:44pm by Cierra

Physical Science
Hello, Can some one please tell me if B is the correct answer? Thank You Which one of the following groups of chemical compounds is composed entirely of organic compounds? A. C2H4O, CH2O, CaSO4, C3H5(OH)3 B. C6H6, C2H5OH, C6H5CH3, C3H5(NO3)3 C. C2H2, CH4, CaCl2, CaCN2 D. ...
Thursday, March 6, 2008 at 4:37pm by Mandi

AP Chemistry
If a ppt occurs it will be what? CaSO4 perhaps. (Ca+2)(SO4^-2) = Ksp. Calculate (Ca^+2) and (SO\$^-2) from the problem, substitute, and see if the ion product (usually called Qsp) is exceeded or not. If Qsp > Ksp, a ppt will occur. If not, no ppt will occur.
Wednesday, April 21, 2010 at 9:32pm by DrBob222

Chemistry
(1) AgNO3 + NaCl -> AgCl + NaNO3 I will be happy to critique your answer to the second question. Iron (III) sulfate should be written Fe2(SO4)3 Calcium hydroxide is Ca(OH)2. Calcium sulfate is CaSO4 Figure out what Iron(III) hydroxide is and balance the reaction.
Thursday, October 25, 2007 at 7:56pm by drwls

chemistry
Which of the following solutes dissolved in 1000 g of water would provide a solution with the LOWEST freezing point? A. 0.030 mole urea, CO(NH2)2 B. 0.030 mole acetic acid, CH3COOH C. 0.030 mole ammonium nitrate, NH4NO3 D. 0.030 mole calcium sulfate, CaSO4 E. 0.030 mole barium...
Sunday, June 20, 2010 at 3:23am by random

chemistry
Ca(OH)2 + H2SO4 -> 2 H2O + CaSO4 The molar mass of Ca(OH)2 is 40 + 2*17 = 74 g/mole. So you consume 3.15 moles of Ca(OH)2 and form twice as many moles of H2O. Use the ideal gas law to convert that to VAPOR volume. I don't see how dimensional analysis helps with this, except...
Friday, December 12, 2008 at 11:20am by drwls

CHEMISTRY
I am having trouble balancing this equation: Ca(OH){subscript 2} + (NH{subscript 4}){subscript 2} SO{subscript 4} -> CaSO{subscript 4} + NH{subscript 3} + H{subscript 2} O Please help, thanks. Response Ca(OH)2 + (NH4)2SO4 --> CaSO4+ 2NH3 + ?___H2O I'm still confused...
Monday, October 13, 2008 at 7:49pm by Anonymous

chemistry
2K^+(aq) + SO4^-2(aq) + Ca^+2(aq) + 2I^-(aq) ==> CaSO4(s) + 2K^+(aq) + 2I^-(aq) Are you omitting the (aq)? That could be the problem.
Monday, October 4, 2010 at 11:24pm by DrBob222

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