Number of results: 30,703
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
What is the molality of a glucose solution prepared by dissolving 18.0g of glucose, C6H12O6 in 125g of water? A)0.000794 B)0.144 C)0.699 D)0.794 Molality is the number of moles of solute per kilogram of solvent. Because the density of water at 25°C is about 1 kilogram per ...
Friday, April 27, 2007 at 2:53pm by CIndy
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
So the Ksp for silver chloride is 1.8*10^-10, how could I find the concentration of silver ions in this saturated solution. Then how I find the total ion concentration? AgCl ==> Ag^+ + Cl^- Let AgCl solubility is x. Then (Ag^+) is x and (Cl^-) is x Ksp = (Ag^+)(Cl^-) = 1.8E...
Thursday, May 17, 2007 at 3:59pm by L
Does the reaction between CO2(g) + Mg(OH)2(aq) produce MgCO3(s) + H2O(l) or Mg(HCO3)2 ??? Normally, Mg(CO3)2 but I suspect an excess of CO2 will produce the bicarbonate. For example, CO2(g) + Ca(OH)2(aq) ==> CaCO3(s) + H2O(l) and that is often done by exhaling into a flask ...
Thursday, May 31, 2007 at 11:19pm by Fiona
For the preparation and standardization of NaOH with KHP im supposed to boil water for 1hr and 30 min to remove CO2....the problem is that if I don't boil it for that long and (30 min) b/c of not enough time but I put the water I boiled for 1/2 hr aproximately into a NaOH ...
Friday, June 22, 2007 at 7:27pm by christina
From The Merck Index--- methylene chloride density = 1.33 g/cc n-butyl chloride = 0.89 g/cc n-butyl bromide = 1.27 g/cc so I expect you are reading it. Were they not listed. Go to the index FIRST (don't try to look them up by name in the alphabetical listing because they may ...
Sunday, September 9, 2007 at 2:39pm by DrBob222
Pertaining to looking at the index first: I'm being overwhelmed by all the different compounds with names I don't even get...=( Oo..I guess I'm supposed to know that D is using the D lines of sodium ? ~I'm getting to learn things 1 thing at at a time. =) so n is the refractive...
Sunday, September 9, 2007 at 2:39pm by ~christina~
[b]1.[/b]Is TLC a qualitative or quantitative analysis? Is there any way that it can be both? Explain. ~I say it can be both since it can be used to go and determine what exactly is in a sample of mixed compounds which would be qualitative analysis. It can also be quantitative...
Saturday, October 13, 2007 at 7:51pm by ~christina~
A word or two about your statement of something being heated producing salt and water. That isn't true unless salt was in the water initially. And then salt shows up only if enough water is evaporated to produce a saturated solution.
Tuesday, January 29, 2008 at 8:31pm by DrBob222
A saturated solution of ammonium sulfate, (NH4)2SO4, in water at 30 0C contains 78.0 g (NH4)2SO4 per 100.0 g H2O. What is the molality of this solution?
Tuesday, February 5, 2008 at 9:19pm by robert
what is the difference between a percent saturated solution of ammonium sulfate and a percent w/v solution of ammonium sulfate?
Friday, February 15, 2008 at 6:23pm by stew
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 ...
Sunday, March 2, 2008 at 2:09pm by timmathy
What is the molarity of a solution containing 20 grams of NaOH in 500 milliliters of solution? a-0.04M b-0.5M c-1M d-2M
Wednesday, March 5, 2008 at 9:14pm by John