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September 1, 2014

Search: CaSO4

Number of results: 129

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...
February 25, 2010 by Anonymous

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.
February 19, 2013 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 ...
September 25, 2009 by Liz

Chemistry
Ca(OCl)2 + 2NaCl + 2H2SO4 <=> 2Cl2 + CaSO4 + NaSO4 + 2H2O [We have to prepare 12 ml of 0.050 M Cl2 (Chlorine water) ] [We are given "solid Ca(OCl)2" , "0.20 M NaCl" and "0.50 M H2SO4" and "D-I water"] What is the required quantity of Ca(OCl)2, NaCl and H2SO4 and volume ...
April 10, 2012 by Bunny

CHEMISTRY
How many moles of Calcium chloride can be added to 1.5L of 0.020potassium sulphate before a precipitate is expected? Assume that the volume is not chnaged significantly. CaSO4 ==> Ca^+2 + SO4^= Ksp = (Ca^+)(SO4^=) = ??. Look it up. (SO4^=) = 0.02 M Use Ksp to calculate (Ca...
May 14, 2007 by Delli

chemistry
If 840 mL of 0.0140 M aqueous Al3+ and 500 mL of 0.0680 M aqueous Br- are reacted, what mass (g) of Br- is produced? Al2(SO4)3(aq) + 3 CaBr2(aq) → 2 AlBr3(aq) + 3 CaSO4(s) Molar Mass (g) Br- 79.904 Al3+ 26.982 Br- 79.904 Molar Volume (L) 22.400 at STP Gas Constant 0.0821
December 7, 2010 by ann

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. ...
March 6, 2008 by Mandi

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...
June 20, 2010 by random

Chemistry PLEASE HELP:(
I really need someone to explain this stoichiometry problem. Directions: 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 ...
January 11, 2013 by Shelbie

chemistry(check my work)
When a reaction mixture with a total volume of 1720 mL that contains 0.605 L of gaseous CO2 measured at STP dissolved in 940 mL of water was stoichiometrically produced as per the balanced equation, how many mol of solid CaCO3 were required? H2SO4(aq) + CaCO3(s) → CO2(g...
April 2, 2010 by eng

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
When 100 mL of Ba(NO3)2 solution at 25 degrees Celsius is mixed with 100 mL solution CaSO4 solution at 25 degrees Celsius in calorimeter, the white solid BaSO4 forms and the temperature of the mixture increases to 28.1 degrees Celsius. Assuming that the calorimeter absorbs ...
December 9, 2012 by Megan

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? The sample is 2.763 grams How much of the 2.763 gram sample is water? I need an amount in grams. Amount of anhyrdate...
October 8, 2011 by Roy

holy school
CaCO3 + H2 SO4 ------> CaSO4 + CO2 + H2 O 200 g of calcium carbonate are added to 4 L of water. a. What is the molarity of the calcium carbonate solution? b. How many moles of hydrogen sulfate would be needed to react with a 25 mL sample of the calcium carbonate solution? c...
March 3, 2013 by mamta

Grade 12 chemistry
For a chem lab, i was given a table that results when pairs of chemical solutions are mixed.For each set of compounds that formed a precipitate, I had to determine the precipitate. I have done that and now one of the questions i have to answer based on the lab: Based on your ...
December 31, 2011 by Teneal

chemistry
The equivalent weights of X and Y are _________ g/equiv. H+ and g/equiv. ľOH, respectively, for the following reaction: Z (Note: Report your answer with 4 significant figures.) X Y Z Answer #1 Answer #2 benzoic acid calcium hydroxide 2 C6H5COOH + Ca(OH)2 2 H2O +Ca(C6H5COO)2 ...
October 22, 2011 by Evani

CHEMISTRY--PLEASE HELP, URGENT
A saturated solution of CaSO4(aq) is made in a beaker until there is excess calcium sulfate resting at the bottom. Then solid potassium sulfate is added. Which of the following is true? (The Ksp for potassium sulfate is larger than the Ksp for calcium sulfate) a. More calcium ...
April 12, 2010 by Maggie

chemistry
Calculation of )Hf0 for Mg2+(aq.) 1. Assume the heat capacity of the final solution is 3.92 J K-1 g-1. Using the mass of the HCl solution, calculate qcontents from equation (4.6). Calculate qsystem from equation (4.5). 2. Calculate the moles of Mg2+ produced, nrxn. Be sure to ...
March 25, 2011 by Narash

Reaction Descriptions
Complete the table below: Enter all letters containing appropriate descriptions for each of the equations below. a. precipitation reaction b. neutralization reaction c. oxidation reduction reaction d. molecular equation e. complete (total) ionic equation f. net ionic equation...
January 12, 2011 by Jerry

Chemistry
Wow, ok, that helps a LOT!! I guess you can't very easily balance an equation that can never happen! :) Thanks a lot! Just to make things clear, wouldn't it have to be Mg3(PO4)2, from balancing the charges? Because PO4 is -2 and Mg is +3, so it would need to be balanced. oops...
April 11, 2007 by Lacey

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 am learning the different types of chemical reactions synthesis, decomposition, single displacement, and double displacement I am also learning skeletal equations word equations and balancing the equations I know how to balance equations if I am given the formula in symbols ...
March 3, 2014 by Sam

Chemistry URGENT/DR BOB
Hello Dr. Bob I have been sick and missed some of my classes and my classmates want to act stupid. So if its not too much trouble could you just make sure that I am on the right track and let me know what is wrong and how I can fix them. I have a lot of assignments that I have...
April 23, 2014 by jazz

Chemistry - Balancing Equations
Balance the following: Ca(OH) + H2SO4 -----> CaSO4 + H2O Na2S2O3 + I2 -----> 2NaI + Na2S4O6 ZnCl + Na2S -----> ZnS + NaCl SnCl4 + H2O ----> SiO2 + 4HCl I figured out the 2nd and 4th one to be: 2Na2S2O3 + I2 -----> 2NaI + Na2S4O6 SnCl4 + 2H2O -----> SiO2 + ...
April 19, 2010 by Akira

Chemistry (urgent)
Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a saturated solution ...
April 12, 2010 by Maggie

Chemistry
Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a saturated solution ...
April 12, 2010 by Maggie

Chemistry
1. Which of the following will result in a chemical change? A. Melting ice to obtain water B. Evaporating alcohol into vapor C. Drying wood in a shed D. Burning coal in a furnace(My answer) 2. A salt is obtained as a reaction between A. a nonmetal and a metal. B. a base and ...
September 27, 2011 by Anonymous

Naming Ionic Compounds
Can you please have a look at my questions. Thank you very much in return:-) 1. Will 2 metals develop an ionic compound? Clarify. I don't think they will, but I don't know how to explain. I only know that in order to form ionic compounds, the total number of electrons given up...
April 21, 2010 by Sara

chemistry
. Which of the following will result in a chemical change? A. Melting ice to obtain water B. Evaporating alcohol into vapor C. Drying wood in a shed D. Burning coal in a furnace 2. A salt is obtained as a reaction between A. a nonmetal and a metal. B. a base and water. C. an ...
July 2, 2013 by smith

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