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April 18, 2014

Search: how many mL urea solution required to react with Fe3+

Number of results: 41,193

Chemistry
Recently I solved for how many mL of 5% BaCl2.2H20 solution was required to precipitate sodium sulfate. Now the question asks what if the sodium sulfate was potassium sulfate instead. Would the volume required be higher or lowered than the sodium sulfate and why? I got that ...
Monday, October 10, 2011 at 8:38pm by Mika

Chemistry
10. When a 5.00 mL sample of vinegar is titrated, 44.5 mLof 0.100 M NaOH solution is required to reach the end point. What is the concentration of vinegar in moles per liter of solution (molarity, M)?
Sunday, November 25, 2012 at 7:23pm by Anonymous

Chemistry
Aqueous ammonia is typically sold by chemical supply houses as the saturated solution, which has a concentration of 14.5mol/L. What volume of NH3 at STP is required to prepare 100. mL of concentrated ammonia solution?
Wednesday, May 1, 2013 at 7:43pm by Shashi

chemistry
6.67 mL of 18.0 molar sulfuric acid solution was dissolved in enough water to make 500 mL of solution. The molarity of the diluted solution is
Monday, October 31, 2011 at 12:29am by Anonymous

chemistry
how many millimeters of a 5.15 M CH3OH stock solution are needed to prepare 375 mL of a solution having 7.50 mg of methanol per mL of solution
Sunday, September 29, 2013 at 6:57pm by Anonymous

ap chemistry
Urea was the first compound, made by the German, Fredrich Wohler, that consisted entirely of inorganic materials making an organic compound. You can read about it here. http://en.wikipedia.org/wiki/Urea
Saturday, September 19, 2009 at 1:16pm by DrBob222

chemistry
26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.
Monday, March 14, 2011 at 5:10pm by Daniel

chemistry
26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.
Monday, March 14, 2011 at 5:14pm by Daniel

Chemistry
If 15.omL of 0.0250 M aqueous H2SO4 is required to neutralize 10.0 mL of aqueous solution of KOH, what is the molarity of the KOH solution?
Monday, May 23, 2011 at 11:03am by Tina

Chemistry
The specific heat of a solution is X J/g*degreesC and its density is Y g/mL. The solution was formed by combining Z mL of solution A with Z mL of solution B, with each solution initially at J degreesC. The final temperature of the combined solutions is D. The heat capacity of ...
Friday, April 2, 2010 at 10:52am by Fred

College Chemistry
SURELY you have a typo. I don't know how you can dilute a 35.0 mL sample to 0.500 mL. You might dilute it to 0.500 L but not mL. I will assume you intended to write "A 35.0 mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100 mL of ...
Sunday, February 21, 2010 at 11:06pm by DrBob222

chemistry
A solution is prepared by dissolving 20.2 {\rm mL} of methanol ({\rm{CH}}_3 {\rm{OH}}) in 100.0 {\rm mL} of water at 25 ^\circ {\rm C}. The final volume of the solution is 118 {\rm mL}. The densities of methanol and water at this temperature are 0.782 {\rm g/mL} and 1.00 {\rm ...
Saturday, July 14, 2012 at 10:14am by aa

chemistry
Transfer the tablet to a clean 125-mL Erlenmeyer flask. Add 10-mL of 1M NaOH and heat the mixture to a gentle boil. Once the solution has cooled to room temperature, transfer it to a 100-mL vol. flask. Using the diluted solution from the 100-mL volumetric flask, rinse a 1-mL ...
Sunday, January 31, 2010 at 7:20pm by eng

Environmental Chemistry
Calculate the pH when the following volumes of 0.20 M LiOH are added into 50 mL of a 0.1 M HCl solution. Both LiOH and HCl are strong electrolytes. a) 0 mL b) 10 mL c) 24.6 mL d) 25 mL e) 25.6 mL f) 30 mL g) 40 mL
Tuesday, May 8, 2012 at 11:50am by Dauren

chemistry
sodium metal dissolves im liquid mercury to form of NA(s) and Hg(l) are 0.97 g/ml and 13.6 g/ml respectively. a sodium amalgoum is made by dissolving 10 ml Na (s) in 20.0 ml Hg (l). The final volume of solution is 21.0 ml. Calculate the molarity of Na in the solution.
Thursday, January 31, 2013 at 9:43am by masharat

Chemistry
The density of the solution is 1.17 g/mL. How much does a liter weigh? 1.17 g/mL x 1000 mL = ?? grams = mass of soln. How much of that is NaOH? 0.0357%; therefore, ?? g soln x 0.0357 = ??g NaOH.(The remainder is the mass of the water in the solution). How many mols NaOH is ...
Sunday, September 7, 2008 at 1:24pm by DrBob222

science
A solution contains 2 mEq/mL of KCL (Molecular weight 74.5). If a 20 mL ampule of this solution is diluted to 1 liter what is the percent strenght of the resulting solution?
Monday, January 14, 2013 at 6:59pm by Felix

chemistry
A solution contains 2 mEq/ml of KCL (Molecular weight 74.5). If a 20 ml ampule of this solution is diluted to 1 liter what is the percent strength of the resulting solution?
Thursday, February 21, 2013 at 2:10pm by Ann

Chemistry
Mass of an aspirin tablet is 0.42g and contains 77.38% ASA by mass. I dissolved the tablet in hot naOH and cooled the solution with distilled water to the mark of 250 volumetric flask. Then I pipetted 5.0 mL of the solution to the 100 mL volumetric flask and I diluted it with ...
Wednesday, April 25, 2007 at 7:34pm by Brissa

chemistry
what volume (in L) of 0.150 M KCl solution is required to completely react with 0.150 L of a 0.175 M Pb(NO3)2 solution according to the following balanced chemical equation? 2KCl (aq) + Pb(NO3)2 (aq) --> PbCl2 (s) + 2 KNO3 (aq)
Monday, June 21, 2010 at 2:05pm by samantha

chemistry
how many grams of glucose are required to produce 50 mL of0.1 m solution?
Thursday, January 18, 2007 at 10:28pm by kelsie

chemistry
How many grams of AgNo3 are required to make 25 mL of a .80M solution?
Friday, December 10, 2010 at 5:22pm by Barbara

chemistry
200X buffer is given in class.How much of stock sol and how much distilled water is used to make? a)50 ml of a 1X buffer solution? b)100 ml of a 20X buffer solution? c)10 ml of a 400X solution
Monday, August 27, 2012 at 9:29pm by anonymous

CHEMISTRY
1.) A solution is prepared by dissolving 5.00 g of stannic nitrate in enough water to make 250.0 mL of stock solution. A 15.0 mL aliquot (portion) of this stock solution is then removed and added to 75.0 mL of water. Calculate the concentrations of all ions in the final ...
Thursday, October 17, 2013 at 9:41pm by Anonymous

Chemistry
Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide,H2O2, can be titrated against a solution of potassium permanganate, KMnO4. The following equation represents the reaction: 2KMnO4(aq)+...
Sunday, October 3, 2010 at 4:29pm by Ellen

chemistry
If a saline solution has a concentration of 0.25 g per mL, calculate the following. a) The concentration of this solution in %w/v. b) The concentration of this solution in grams per litre (g/L). c) The concentration of this solution in milligrams per mL (mg/mL).
Wednesday, November 7, 2012 at 6:10pm by Hannah

Chemistry
A solution of HCL whose pH=2.010 was added to neautralize a 40.00 ml solution of KOH, the molarity of KOH is .2567 M. How many mls of HCl were required?
Monday, October 10, 2011 at 8:11pm by Anonymous

chemistry
An aqueous solution of phosphoric acid, H3PO4, contains 285 g H3PO4 in 400 mL solution, and has a density of 1.35 g/mL. Calculate a. the weight % H3PO4 in this solution. b. the concentration in mol/L of this solution
Wednesday, November 10, 2010 at 4:12pm by princess

Chemistry
A solution of I2 was standardized with ascorbic acid. Using a .1000 g sample of pure ascorbic acid, 25.32 mL of I2 were required to reach the starch end point. A. What is the molarity of the iodine solution? B. What is the titer of the iodine solution?
Wednesday, November 10, 2010 at 10:56pm by Candy

Chemistry
A solution of I2 was standardized with ascorbic acid. Using a .1000 g sample of pure ascorbic acid, 25.32 mL of I2 were required to reach the starch end point. A. What is the molarity of the iodine solution? B. What is the titer of the iodine solution?
Wednesday, November 10, 2010 at 10:59pm by Candy

chemistry
If the 12.5ml of NaOH solution is required to react completely with 0.300g of KHP (Potassium Hydrogen Phthalate, 204.2g/mol). What is the molarity of NaOH?
Tuesday, December 11, 2012 at 3:57pm by paul

chem
How many milliliters of 4.80 M HCl are required to react with 110 mL of 1.48 M Al(OH)3? Al(OH)3(s) + 3HCl(aq)to AlCl3(aq) + 3H2O(aq)
Thursday, November 8, 2012 at 5:47pm by daisy

Chemistry
Use Ksp to find the concentration of an ion in a saturated solution. Consider a 2.50E-3 M solution of Al2(SO4)3. (a) What [OH^-] is required to initiate precipitation of Al^3+ from the solution? (b) What [OH^-] is required to lower the [Al^3+] to 2.00E-7 M ?
Saturday, July 28, 2012 at 12:04am by Jo

College General Chemistry
How would you prepare each of the following solutions? a. 100mL of a 155ppm solution of urea, CH4N2O, in water. b.100mL of an aquaneous solution whose K+ concentration is 0.075M
Monday, January 31, 2011 at 10:01pm by DONDON

Chemistry
Is my answer in 3 sig fig or 4 sig fig?? A solution is prepared by dissolving 12.80 g of magnesium chlorite in enough water to make 200.0 mL of stock solution. A 25.0 mL aliquot (portion) of this stock solution is then removed and added to 250.0 mL of water. Calculate the ...
Sunday, October 20, 2013 at 8:21pm by Anonymous

CHEM HELP?!
A particular household ammonia solution (D= 0.97g/ml) is 6.8% by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH= 11.65?
Monday, February 16, 2009 at 7:54pm by i need help!

CHEM
A particular household ammonia solution (d= 0.97g/mL) is 6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH = 11.55?
Monday, February 16, 2009 at 11:20pm by help!!!

chem
A particular household ammonia solution (d= 0.97g/mL) is 6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH = 11.55?
Tuesday, February 17, 2009 at 12:10am by help!!!

chem
If you have a .045 M solution of sodium hydroxide, how many mL of the solution do you need to neutralize 6.5 mL of a .055 M sulfuric acid solution? do i use the equation M1V1 = M2V2?? or is that for dilutions
Sunday, September 6, 2009 at 5:01pm by sam

Chemistry
A solution is prepared using 15.0 mL of 1.0 M HCl and 20.0 mL of 0.5 M HNO3. The final volume of the solution is 1.25 L. What are the [H3O+] and [OH-] in the final solution? What is the pH of the final solution?
Saturday, May 22, 2010 at 12:31pm by Heather

Chemistry
A solution is prepared by dissolving 50.0 g of pure HC2H3O2 and 20.0 g of NaC2H3O2 in 975 mL of solution (the final volume). what is the ph? What would the pH of the solution be if 50.0 mL of 0.900 M NaOH were added? What would the pH be if 30.0 mL of 0.30 M HCl were added to ...
Monday, November 12, 2012 at 8:39pm by Bella

Chemistry
Consider a solution containing 4.35 mM of an analyte, X, and 1.09 mM of a standard, S. Upon chromatographic separation of the solution peak areas for X and S are 3251 and 10075, respectively. Determine the response factor for X relative to S. F=? To determine the concentration...
Friday, June 7, 2013 at 5:06pm by ScienceGeek

AP Chemistry
What volume of 0.149 M K3PO4 is required to react with 41 mL of 0.793 M MgCl2 according to the equation 2 K3PO4 + 3 MgCl2 → Mg3(PO4)2 + 6 KCl Answer in units of m
Friday, October 7, 2011 at 9:46pm by Yolanda

Chemistry. please help
A 0.12 g sample of unknown was placed in a flask and dissolved in 125 mL of deionized water. A solution of HCl (0.10 M) was used to titrate the sample, and 18 mL was required to reach the endpoint. What is the formula weight of the unknown?
Wednesday, December 8, 2010 at 8:42pm by Stephanie

chemistry
how many milliliters of 6.00 M HCl are required to react with 60.0 ml of 1.96 M Al(OH)3? Al(OH)3(s)+3HCl(aq)-->AlCl3(aq)+3H2)(aq)
Friday, October 8, 2010 at 10:22pm by Samantha

Chemistry
You made 100.0 ml of a lead (II) nitrate solution for lab but forgot to cap it. The next lab session you noticed that there was only 80.0 ml left. In addition, you forgot the initial concentration of the solution. You decide to take 2.00 ml of the solution and add an excess of...
Monday, October 30, 2006 at 8:04pm by Anonymous

chemistry
Benzene, C6H6, is a known carcinogen that burns in air according to the following unbalanced equation: C6H6(l) + O2(g)  CO2(g) + H2O(g) a. What is the mole ratio of O2 to C6H6? b. How many moles of O2 are required to react with each mole of C6H6? c. How many moles of ...
Sunday, July 3, 2011 at 1:50pm by ABCD

Help me! pls...
what are the physical properties and chemical properties of ammonium cyanate? Go to www.chemfinder.com and search this chemical. It is Urea. Read here: http://www.3rd1000.com/urea/urea.htm Urea and ammonium cyanate are isomers. In the solid state,they have differing crystaline...
Sunday, August 28, 2005 at 5:56am by Danielle Stacey

chemistry
A particular household ammonia solution (d = 0.97 g/mL) is 6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH = 11.50?
Sunday, March 28, 2010 at 5:27am by anonymous

Chemistry
From the equation, we conclude that one mole of HCl will react with one mole of NH4OH, which means that you only have to equate the product of the molarity of the solutions and the respective volumes, i.e. conc.HCl*25 ml = 0.1M * 10 ml conc.HCl = 0.1M*10ml/25ml = 0.04M If the ...
Monday, November 22, 2010 at 3:18am by MathMate

chemistry
A certain acetic acid solution has pH = 2.14. Calculate the volume of 0.0900 M KOH required to reach the equivalence point in the titration of 35.0 mL of the acetic acid solution.
Thursday, April 3, 2014 at 8:17pm by Tessa

Chemistry
Preparing solutions a. A solution was prepared by dissolving 5.65 g potassium bromide in 32.67 g water. What is the concentration of this solution in weight percent? b. The solution was poured into a 100 mL volumetric flask and water was added to the mark on the flask. What is...
Thursday, May 19, 2011 at 12:32am by Shell

chemistry
How many grams of Na2CO3 are required to completely react with 35.6mL of a 0.315M HCl solution? Na2O3(s) + 2HCl(aq) --> 2NaCl(aq( + CO2(g) + H2O(I)
Saturday, July 2, 2011 at 12:21am by ashley

chemistry
How many grams of Na2CO3 are required to completely react with 35.6mL of a 0.315M HCl solution? Na2O3(s) + 2HCl(aq) --> 2NaCl(aq( + CO2(g) + H2O(I)
Saturday, July 2, 2011 at 12:23am by ashley

chemistry
how many grams of solid NaOH are required to prepare 200 ml of a .05 M solution?
Thursday, February 5, 2009 at 10:17pm by ash

chemistry
how many milliliters of 5M NaCl are required to prepare 1500 ml of .002M solution?
Thursday, February 5, 2009 at 10:20pm by ash

chemistry
how many grams of solid NaOH are required to prepare 200.0 mL of a .050 M solution?
Tuesday, September 1, 2009 at 10:37pm by mariah

chemisty
how many grams of magnesium sulfate are required to make 575 ml of a 1.65% (m/v) solution
Monday, March 7, 2011 at 7:03pm by jess

chemistry
What volume in mL of a 1.06 M NaOH solution is required to neutralize 12 g of HCl?
Monday, November 21, 2011 at 8:03pm by Hani

chemistry
Calculate the grams of K2CO3 required to prepare 546.0 mL of a 0.789 g/L K+ solution.
Wednesday, February 15, 2012 at 12:14pm by donald

Chemistry
What mass of NaOH is required to prepare 500.0 mL of 0.1029 M stock solution?
Tuesday, October 9, 2012 at 3:06am by Erin

Chem
What volume of 6.0 M sulfuric acid is required for the preparation of 500.0 mL of 0.30 M solution?
Wednesday, November 21, 2012 at 10:32am by Sam

Chem
What volume of 6.0 M sulfuric acid is required for the preparation of 500.0 mL of 0.30 M solution?
Wednesday, November 21, 2012 at 10:32am by Sam

Chem
What volume of 6.0 M sulfuric acid is required for the preparation of 500.0 mL of 0.30 M solution?
Wednesday, November 21, 2012 at 10:37am by Sam

Analytical chemisty
How many grams of K2Cr2O7 are required to prepare 500 ml of a 0.13 N solution?
Saturday, February 2, 2013 at 7:33pm by Anonymous

Chemistry
Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??
Tuesday, April 9, 2013 at 2:19pm by Karen

Chemistry
Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??
Tuesday, April 9, 2013 at 2:32pm by Karen

chemistry
Your question isn't stated very well. Do you mean something like this? Prepare 100 mL of a 500 mM HCl solution using HCl with a purity of 37% HCl and a density of 1.18 g/mL. If so, the first thing to do is to calculate the molarity of the 37% HCl solution. That will be 1000 mL...
Wednesday, March 30, 2011 at 11:26pm by DrBob222

chemistry
If 35.7{\rm mL} of 0.205{\rm M} {\rm KOH} is required to completely neutralize 20.0{\rm mL} of a {\rm HC_2H_3O_2} solution, what is the molarity of the acetic acid solution? {\rm HC_2H_3O_2}(aq) + {\rm KOH}(aq) \to {\rm KC_2H_3O_2}(aq) + {\rm H}_{2}{\rm O}(l)
Monday, July 30, 2012 at 5:36am by Anonymous

Chemistry
To illustrate the calculation, assume that 21.95 mL of a thiosulfate solution is required to reduce the iodine liberated by 20.85 mL of 0.0200M KIO3 and that 18.63 mL of the same thiosulfate solution reacts with the iodine replaced by 20.00 mL of an unknown solution of sodium ...
Friday, April 26, 2013 at 8:24pm by Marcus

chemistry
How many milliliters of a 0.16 M HCl solution are needed to react completely with 4.8 g of zinc to form zinc(II) chloride? Answer in units of mL
Wednesday, September 19, 2012 at 4:29pm by cheri

Chemistry
2KMnO4(aq)+16HCl(aq)->2MnCl2(aq)+5Cl2(g)+8H2O(l)+2KCl(aq) A.)the volume of 0.414 M KMnO4 needed to produce 1.66 mol MnCl2 B.) the volume of 2.15 M HCl needed to produce 112 mL of 0.618 M KCl C.)the molarity (M) of the HCl solution when 26.42 mL react with 28.38 mL of 0.398 ...
Friday, December 10, 2010 at 1:40pm by Anonymous

AP CHEMISTRY
Determine the volume of 0.125 M NaOH required to titrate to the equivalence point 25.0 mL of a 0.175 M solution of a monoprotic weak acid that is 20% ionized. Answer is 35.0 mL. How do you find it?! It's been a really long time since we talked about titrations. Please help (:
Friday, March 29, 2013 at 1:20am by Ash

Chemistry- I NEED HELP!
A particular household ammonia solution (D= 0.97g/ml) is 6.8% by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH= 11.65?
Monday, February 23, 2009 at 11:53am by Pokadot Shorts

chemistry
A solution is prepared by dissolving 25.0 g of ammonium sulfate in enough water to make 100.0 mL of stock solution. A 10.0 mL sample of this stock solution is added to50.0 mL of water. Calculate the concentration of ammonium ions and sulfate ions in the final solution.
Tuesday, March 1, 2011 at 2:30pm by Anonymous

chem
A solution contains 4.60 g KCl in 179 mL of solution. The density of the KCl solution is 1.11 g/mL What is the percent (m/m) for the potassium chloride solution? What is the molarity, M, for the potassium chloride solution? need help pls
Thursday, November 8, 2012 at 6:14pm by byke

Chemistry-pls help urgent
If it's the same 69% w/w with a density of 1.42, then we know it is 69g HNO3/100 g soln. 100 g soln has a volume of 70.4 mL so the solution is 69 g x 100/70.4 = 97.98 g/100 mL which I will round to 98 g/100 mL. We want, say, 10% w/v. 10% w/v means 10 g HNO3/100 mL solution. We...
Tuesday, October 12, 2010 at 5:52pm by DrBob222

chem101
If a solution contains 0.0100 mole of HCl in 10.0 mL aqueous solution. a.) What is its molarity? My answer is 1M (0.0100 mole/10.0 mL * 1000 mL/1L = 1M) b.) What is H^+ ion concentration for this solution? c.) What is the expected pH for this solution? pls help i don't know ...
Wednesday, November 28, 2012 at 9:32am by audrey12

chemistry
A stock solution is prepared by adding 26 mL of 1.1 M K3PO4 to enough water to make 30 mL. How many moles of K+ are in 21 mL of the stock solution?
Thursday, November 4, 2010 at 9:24pm by Ashley

chem
A solution is prepared by dissolving 16.5 g ammonium sulfate in enough water to make 145.0 mL of stock solution. A 10.50 mL sample of this stock solution is added to 57.70 mL of water. Calculate the concentration of ammonium ions and sulfate ions in the final solution. NH4+
Saturday, November 3, 2007 at 11:32pm by mel

Chemistry
A 30 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: 30 mL, 35 mL, 36 mL, 37 mL, and 40 mL.
Tuesday, March 8, 2011 at 11:43pm by Melissa

Chemistry
A 30 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: 30 mL, 35 mL, 36 mL, 37 mL, and 40 mL.
Tuesday, March 8, 2011 at 11:49pm by Melissa

Chemistry
(a) Calculate the molarity of a solution that contains 0.175 mol ZnCl2 in exactly 150 mL of solution. (b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid? (c) How many milliliters of 6.00 MNaOH solution are needed to provide 0.325 mol of NaOH?
Monday, October 31, 2011 at 1:12am by Anon

Chemistry
78 mL of a 1.60M solution is diluted to a volume of a 238mL. A 119-mL portion of that solution is diluted using 133 mL of water. What is the final concentration
Friday, April 13, 2012 at 7:41pm by Sam

Chemistry
How many milliliters of 0.277 M AgNO3 solution are needed to react completely with 47.1 mL of 0.278 M NaCl solution? How many grams of AgCl will be formed? The reaction is NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq)
Tuesday, November 1, 2011 at 10:31am by Lynn

chem
what is the molality of a solution of 50.0 grams of propanol in 152 mL water if the density of wate is 1.0 g/mL and the density of the solution is 0.78 g/mL
Saturday, February 12, 2011 at 8:58pm by paula

chemistry
What is the percent by volume (% v/v) of a solution made by mixing 12 ml of ethanol (C2H5OH) with 48 ml of water? b) Assuming the density of ethanol is 0.789g/ml, what is the molarity of this solution?
Tuesday, March 19, 2013 at 4:52pm by ben

Honors Chemistry
An aqueous solution of NaCl has a concentration of .500 M. 35.0 mL of this solution is allowed to evaporate to a volume of 20.0 mL. a) Is the solution more concentrated or more dilute afterwards? b) What is the new concentration of the solution?
Friday, May 4, 2012 at 1:13am by Lou

chemistry
A 0.2481 g sample of marble was dissolved in 100 mL, and a 10.00 mL aliquot of the solution was titrated to an end point with 23.56 mL of 0.01052 M EDTA solution. What is the molecular weight? I know how to start this problem. Any help is appreciated!
Thursday, October 1, 2009 at 7:21pm by Anonymous

chem 103
Thank you so much! Now for the second part of the question. How many ml of that stock solution would you need to prepare 175 ml of 0.750 M diluted Na3PO4 solution? My answer is 4.27 ml of stock solution. Is that correct? Thank you. If yes , the next part of the question is: if...
Sunday, July 14, 2013 at 1:35pm by Andrew

Math
To conduct a scientific experiment, students need to mix 90 mL of a 3% acid solution. They have a 1% and a 10% soulution available. How many mL of each of the two solution must they combine to pruduce 90mL of the 3% solution?
Sunday, December 5, 2010 at 10:05pm by James

Chemistry
Do you need the density? If that is a small m then it is molality and not molarity and I don't think the density is needed, 2.30 m = moles/kg solvent mols = 2.30 grams = moles x molar mass = 2.30 x 60 = ?? Total mass of solution = 1000 g + g urea = xx. percent = (grams urea/...
Tuesday, February 9, 2010 at 11:09pm by DrBob222

chemistry
(3 pts) The stockroom prepared a solution by dissolving 0.2300 g of Erythrosin B (MW = 879.87 g/mol) in DI water in a 250.00 mL volumetric flask. A student pipetted 5 mL of the stockroom solution into a 100.00 mL volumetric flask and diluted it to the mark with DI water. The ...
Monday, February 4, 2008 at 6:50am by Anonymous

chemistry
A 150.0-mL sample of Solution A is diluted to a total volume of 423 mL to form Solution B. If the concentration of Solution A was originally 20.0 mg/L, what is the concentration (in mg/L) of Solution B?
Sunday, September 18, 2011 at 5:50pm by alex

Chemistry
how many milliliters of a 0.78 M HCl solution are needed to react completely with 6.4 g of zinc to form zinc(II) chloride? Answer in units of mL.
Tuesday, October 5, 2010 at 9:45pm by Nathan Espinosa

Chemistry
How many milliliters of ozone gas at at 25.0C and 1.00 atm pressure are needed to react with 45.00 mL of a 0.300 M aqueous solution of KI
Wednesday, October 31, 2012 at 9:23pm by Anonymous

AP Chemistry
How many milliliters of a 0.62 M HCl solution are needed to react completely with 4.7 g of zinc to form zinc(II) chloride? Answer in units of mL
Tuesday, September 10, 2013 at 9:34pm by Gabriella

Chemistry
(a)What is the pH of a solution made by combining 200 mL of 0.1 M Lactic Acid with 300 mL of 0.075 M sodium lactate? (b) If 20 mL of 0.4 M HCl is added to the solution from (a) what is the resulting pH?
Tuesday, January 28, 2014 at 10:12pm by Anonymous

Clinical Calculations
What weight of NaOH would be required to prepare 3000 ml of a 2.5M solution?
Sunday, November 8, 2009 at 8:22pm by Tamaka

Chemistry lab
What mass of NaOH is required to prepare 500.0 mL of 0.1029 M stock solution?
Tuesday, October 9, 2012 at 10:43am by Donnie

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