Number of results: 23,921
The problem you helped me with: A liter of a solution saturated at 25 deg C with calcium oxalate, CaC2O4 is evaporated to dryness, giving a .0061 gm residue of CaC2)4. Calculate the concentrations of the inons, and the molar solubility and the solubility product constant for ...
Sunday, June 11, 2006 at 6:02am by Anonymous
Hi, my question is: "Classify each of the following as saturated, supersaturated, or unsaturated: KNO3 90g/100g at 82*C NaCl 36g/100g at 23*C KCl 35g/100g at 18*C NaNO3 90g/100g at 28*C How do I determine if they are saturated, supersaturated, or unsaturated? Since the ...
Sunday, June 11, 2006 at 1:51pm by Waleed
Dr.Bob (thx) Check my work for this one pls
What is the molar solubility of Sr3(AsO4)2 and the concentration of Sr^2+ and AsO4^-3 in a saturated solution at 25 deg Celsius? The Ksp is 1.3E-18. Show the balanced reaction. Below, I write M.S. (molecular solubility) 1)Sr3(AsO4)2<---> 3Sr^2+ + 2AsO4^-3 M.S. xmol/L 3x ...
Sunday, June 11, 2006 at 3:18pm by Kizner
I'm tyring to study for my chem exam and I cant figure out how to do this question: The solubility of MgCl2 is 54.25 g per 100ml of water at 25 degrees C. A student prepares a 2.50 mol/L solution of MgCl2 and states it is a saturated solution. Useing calculations determine if ...
Saturday, June 17, 2006 at 11:55am by Tracy
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 ...
Tuesday, June 20, 2006 at 3:23pm by Tracy
Question: What would happen if a hot saturated solution were filtered by vacuum filtration using a Buchner funnel? Hint: Cooling will occur. My answer: A Buchner funnel is primarily used to collect a solid from a liquid. When the hot solution cools when coming in contact with ...
Tuesday, September 26, 2006 at 10:16pm by Sheryl
To Sheryl: polarity
The exact question is: Benzyl alcohol (bp 205 degree C) was selected by a student to crystallize fluorenol (mp 153-154 degrees C) because the solubility characteristics of this solvent are appropriate. However, this solvent is not a good choice. Explain. So the melting point ...
Wednesday, September 27, 2006 at 3:56pm by DrBob222
Solubility of a Salt - Chemistry
a) How many grams of potassium nitrate (KNO_3) can be dissolved in 100 mL of water at 30°C, 60°C, and 70°C? b) How many grams of potassium nitrate should be added to 100 mL of water at 25°C to make a saturated solution? c) The solubility of potassium nitrate increases as ...
Tuesday, October 10, 2006 at 9:52pm by J.M.
Solubility of a Salt - Chemistry
a) How many grams of KNO_3 should be added to 100 mL of water at 25°C to make a saturated solution? b) The solubility of KNO_3 increases as temperature increases. When KNO_3 dissolves, is the process endothermic or exothermic? c) When CaCl_2 dissolves, the process if ...
Monday, October 16, 2006 at 8:07pm by J.M.
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?
Wednesday, January 10, 2007 at 10:28pm by Alexus
WHAT IS A CHEMICAL WITH A HIGH PH? A saturated solution of sodium hydroxide has a very high pH. IS SODIUM HYDROXIDE ALKALINE VERY
Wednesday, January 31, 2007 at 3:11pm by Anonymous
See the question from earlier regarding how many variables are in the experiment. I think speed of stirring is a variable. So, my answer would be 3 variables. One for water temp., speed of stirring, and the calcium carbonate solubility. Is this right? I don't think speed of ...
Tuesday, February 13, 2007 at 7:27pm by Hailey
how do you turn a saturated solution into an unsaturated one Add solvent. Some of the solute will dissolve in the added solvent.
Monday, February 26, 2007 at 7:47pm by lisa
Look on your calculator. You know the definition of pH. It is pH=-log(H^+). Well, we have the same thing in pKa, pKb, pOH, pKw, etc etc. pKsp = -log Ksp. Punch 57.685 into the calculator. Now change the sign to make it negative. Now look for a button that says 10x and punch ...
Tuesday, February 27, 2007 at 9:09pm by DrBob222
I have no idea how to solve this problem, please help me out.... thanks a) A liter of a solution saturated at 25degree with calcium oxalate, CaC2O4, is evaporated to dryness, giving a 0.0061gm residue of CaC2O4. calculate the concentrations of the ions, and molar solubility ...
Friday, April 6, 2007 at 10:19pm by wendy
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)<--&...
Wednesday, April 11, 2007 at 7:05pm by Kristina
What is the average ion concentration in a 7.9 mL saturated solution of calcium hydroxide containing calcium chloride (CaCl2)?
Tuesday, April 24, 2007 at 9:20pm by Erica
Can someone explain what it is meant for a solution to be supersaturated with respect to calcite? and then what is meant for a solution to be in equilibrium with calcite? Many Thanks A supersaturated solution contains more solute than is normally soluble. For calcite, that ...
Tuesday, May 1, 2007 at 7:17pm by Mary
Wondering If I did this correctly so far 50.0 ml of a 0.0500 M solution of lead (II) nitrate is mixed with 40.0 ml of a 0.200 M solution of sodium iodate at 25°C. Calculate the Pb2+ and IO3- concentrations when the mixture comes to equilibrium. At this temperature the Ksp for ...
Monday, May 14, 2007 at 11:09am by Jason