Search: If you make up a solution of 100mL of 0.1M HEPES in the basic form, what will be the pH

Number of results: 83,694

chem
what are 6 elemts that make up Yellow Gold? What are 6 elements that make up White Gold? What are 5 elements for platinum for gemstone settings? what are 2 elements that make up palladium for gemstone settings? what is 1 element that makes up a diamond? 3 elements that make up...
Monday, November 29, 2010 at 12:01pm by samantha

chemistry
require 400 mL of a 0.4 M NaOH solution and you have a 1.2 M stock solution. How would you make up the solution?
Tuesday, September 13, 2011 at 1:27pm by roshan

Chemistry
Are these 5% and 2% mass-volume? To dilute a 5% solution to a 2% solution, we need to dilute it by a factor of 2.5 (2/5 = 1/2.5). So a 5% solution contains 5 g HCl/100 mL solution. So if we end up with 1000 mL of solution, how many g HCl must be there to be 2%. X/1000 = 0.02...
Tuesday, April 14, 2009 at 8:18pm by DrBob222

Chemistry
What is the molarity of a solution of Mg(OH)2 if the solution contains 1.35 g in exactly 100 mL of solution??? A 15.0 mL solution of H2SO3 is neutralized by 12.0 mL of a standradized 1.00M NaOH solution. What is the concentration of the H2SO3 solution?????? What volume of a 1....
Wednesday, December 12, 2012 at 12:24am by Tasha

chemistry
Adding acid will make it more acid; pH will go down. Adding base will make the solution more basic; pH will go up. Adding water will make the solution more dilute and it will change the pH somewhat (a little more basic making pH go up); how much depends upon how much water is ...
Monday, January 24, 2011 at 10:58pm by DrBob222

chemistry
AgNO3 was dissolved in water to make 10mL of solution. Then 3.0mL of that solution was used to make a new solution with a total volume of 1.000L. What was the concentration of the silver ion in the final solution?
Monday, October 5, 2009 at 3:47pm by Anonymous

science
In the lab you need to make 1.00 L of a 0.300 M NaCl solution. You had previously made a 0.950 M NaCl solution that you can dilute to form your new solution. How many mL of the concentrated solution would you use to make the dilute solution?
Wednesday, November 2, 2011 at 3:56pm by liz

Chemistry
Calculate the amount of solute needed to make the solution. I can't remember how to set these up. .50kg of a 18% (m/m) KOH solution
Thursday, May 19, 2011 at 9:52am by Monster

Science
If you have a 12M container of HCl avaliable. How much of this solution is needed to make up a 5.0L solution of 0.10M concentration?
Monday, May 7, 2012 at 11:50am by Sue

Chemistry
3) You make a solution by dissolving 3.4g Ba(OH)2 in enough water to make 450ml of salt solution. a. What is the molarity of the solution?
Tuesday, June 28, 2011 at 11:40am by Sasha

Chemistry
3) You make a solution by dissolving 3.4g Ba(OH)2 in enough water to make 450ml of salt solution. a. What is the molarity of the solution?
Tuesday, June 28, 2011 at 11:39am by Sasha

Chemistry 1
How many grams of a stock solution that is 92.5 percent H2SO4 by mass would be needed to make 250 grams of a 35.0 percent by mass solution? Can you please teach me how to do this? I get the other stoichiometry stuff, but this one tripped me up because I don't know how to ...
Tuesday, February 1, 2011 at 8:10am by Brittany

pharmacy tech.
Prepare 500ml of a 1:5 solution using a 1:10 solution and a 1:4 solution. What quantities will be used of each stock solution to make the 1:5 solution?
Sunday, August 5, 2012 at 6:59pm by blackpearl07

pharmacy calculations
prepare 500 ml of a 1:5 solution using a 1:10 solution and a 1:4n solution. what quantities will be used of each stock solution to make the 1:5 solution?
Friday, August 3, 2012 at 1:08pm by cleondra

chemistry
Make up a 500mL solution of 4.8M solution HCl (HCl gmw= 36.5g)
Sunday, September 9, 2012 at 9:05pm by Dena

Chemistry
A 15% solution is 0.15 g KOH/g solution. And since the density is 1.14 g/mL, that is 0.15g/1.14 mL or about 0.13 g/1 mL. How much of that do you need? pH = 11.4. Convert to pOH and from there to (OH^-). I get close to 2.5 M. That is 2.5 mols KOH/liter of solution. How much do ...
Saturday, February 14, 2009 at 4:38pm by DrBob222

science(chem)
I'm not looking at that page; however, look at it this way. 70% solution means that if we take 100 g of solution, 70% (or 70 g will be the solute and 30 g is the solvent to make 100 g of solution. And that is consistent with making a 70% solution of something, w/w. To make...
Sunday, November 4, 2007 at 4:40pm by DrBob222

Chemistry
Calculate the solid needed to make a 250ml solution that is 0.34M in sodium cation, using sodium sulfate decahydrate. I came up with 13.685g. but how do I make that into 250ml of a solution that is0.34M in sodium cation?
Thursday, October 27, 2011 at 9:41pm by Denise

Chemistry
Question: Suppose you have 557 ml of 0.0300M HCL and you want to make up a solution of HCL that has a pH of 1.831. What is the maximum volume (in liters) that you can make of this solution? I know that you can get the concentration of HCL using the pH given, but how do you ...
Tuesday, March 3, 2009 at 10:05pm by eliz

chemistry
URGENT!! You wish to prepare 1 L of a 0.02 M potassium iodate solution. You require that the final concentration be within 1% of 0.02 M and that the concentration must be known accurately to the fourth decimal place. How would you prepare this solution? Specify the glassware ...
Monday, October 11, 2010 at 2:37pm by Martin

Chemistry
You are using concentrated hydrochloric acid solution (12.0 M)to make 445.0 ml of a 5.85 M solution. Calculate the number of milliliters of concentrated HCl required to make the solution.
Thursday, March 7, 2013 at 1:22pm by Tanya

Chemistry
Silver nitrite, AgNO2 (47.8 mg), was dissolved in water to make 10.00 mL of solution. Then 3.00 mL of that solution was used to make a new solution with a total volume of 1.000 L. What was the concentration of the silver ion in the final solution?
Tuesday, June 26, 2012 at 6:02pm by ODCA

Chemistry
Does it make sense to you that you can subtract 454.935 g from 455 g to make a 6.5% solution? What's X? X is the amount of Na2SO4 that must be added to some water to make the 6.5% solution of Na2SO4.
Wednesday, February 6, 2008 at 9:33pm by drbob222

Chemistry
It depends upon how much you want to make up; e.g., a cup, a liter, a tub? In general, a 0.2%(w/v) solution can be made by dissolving 0.2 g (200 mg) of the solute in 100 mL of solution. For other volumes, just change the numbers.
Monday, January 5, 2009 at 9:13pm by DrBob222

Chemistry
What mass of sucrose (C12H22O11) would you combine with 5.28 102 g of water to make a solution with an osmotic pressure of 9.14 atm at 298 K? (Assume a density of 1.0 g/mL for the solution.) I came up with 67.5 but no luck...help please!!
Tuesday, July 3, 2012 at 8:15am by Anonymous

Chemistry 1
We are working on molarity of a solution in my class, and I am a little stumped on how to set the problems up. Here is one question from my homework. How many grams of NaCl are needed to make 575mL of 1.5 M NaCl solution? Thank you in advance :)
Thursday, January 3, 2013 at 7:40pm by Emily

Algabra A(1)
a solution of 67% soution is mixed with a solution o f57% to make 30 liters of a 59% solution. How many of each solution is used?
Tuesday, January 3, 2012 at 6:01pm by Hannah

Chemistry
Lane, Kristy, Da or whomever, please don't change screen names. It gets us mixed up. Technically, I can't answer this question. If you want 3% w/w solution, you place 3g NaCl with 97 g H2O (is that the solvent?) but I don't know what volume that will be. Certainly ...
Monday, January 5, 2009 at 9:19pm by DrBob222

chemistry
Thimerosal is an organic compound (gram molecular mass = 404.8 g/mol) used to inhibit bacterial growth. A .100%solution of thimerosal is sometimes used as an antiseptic. Assume that this solution has a density of 1.00 g/mL. A. how many grams of thimerosal are found in .500 g ...
Sunday, April 7, 2013 at 10:09pm by Tyler

chemistry
I asked this before, but got no response. A) If you make up a solution of 250 mL of 0.1 M TRIS in the acid form, what will be the pH? B) If you add 2 mL of 1 M NaOH to the solution in part A, what will be the pH? Thanks.
Sunday, February 3, 2008 at 2:43pm by student

chemistry
A) If you make up a solution of 50 mL of 0.1 M TRIS in the acid form, what will be the pH? (pka of TRIS: 8.3, molecular wt: 121.1 g) B) if you add 2mL of 1 M NaOH to the solution, what will be the pH? Thank you.
Saturday, February 2, 2008 at 4:09pm by matt

chemistry
Which 2.5. There are two 2.5. One is 2.5M and one is 2.5L. The 2.5M comes from the 6L of 2.5M solution that you are preparing. The 2.5L is the volume of the 2M solution and the 4M solution that you are to mix together to obtain the 6L of 2.5M solution. HOWEVER, this is not the...
Wednesday, May 11, 2011 at 6:13pm by DrBob222

chemistry
this is a really long question. i don't understand how to answer it. help please. A 10.0% aquueous solution of sulfuric acid has a density of 1.0661 g/mL at 20 degrees celsius. A. how many grams of H2SO4 are found in 50.0 g of this solution? B. how many grams of water are ...
Sunday, April 7, 2013 at 10:58pm by Nicole

Chemistry
Ammonia, NH3 is freely soluble in water, and has the value Kb=1.8x10^-5. If the pH of an ammonia solution is 11.4272, then what original concentration of NH3 (molarity) was used to make up the solution?
Tuesday, July 27, 2010 at 10:49pm by Sam

science(chem)
I was wondering how does one make a saturated chemical solution? I'm supposed to make one, is there a way I can determine the ammount solute needed for a certain amount of solvent? If not, how do I make a saturated solution? Thank you
Saturday, September 20, 2008 at 8:39am by ~christina~

A/P Chem
A student wants to make a 5.00% solution of potassium chloride using .0377 g of the substance.What mass of water will be needed to make the solution?
Sunday, July 24, 2011 at 8:17pm by Autum

chemistry
You really need to state your questions a little clearer; however, I think I know what you mean in this problem. You always make up to the mark or add up to some final volume in dilutions. When using a solid or a liquid to make a solution, you always want to end up with the ...
Sunday, November 27, 2011 at 1:07pm by DrBob222

chemistry
explain how you would make the following solution. You should tell how many grams of the substance you need to make the solution, not how many moles. 2L of 6M HCl
Wednesday, May 5, 2010 at 7:28pm by Jenny

Chemistry
explain how you would make the following solution. You should tell how many grams of the substance you need to make the solution, not how many moles. 2L of 6M HCl
Wednesday, May 5, 2010 at 5:45pm by Jenifer

Biology
For 14 ... Start by determining what the molecular subunits - the monomers - that make up DNA are. Then look up what things make up such a monomer.
Wednesday, February 3, 2010 at 8:11pm by Anonymous

science
I have used dilute-IT to make a o.1N solution of HCl in .6 N NaCl after bringing the solution to the exact mark on the volumetric flask it lost volume do to off gassing, do I bring it back up to the exact volume?.
Friday, September 2, 2011 at 5:15pm by Michelle

Quadratic -Make up a problem
I am supposed to write a quadratic equation in the varible x having the given numbers as solutions. Type the equation in standard ax^2+bx+c=0 my solution is 1, only one solution. The equation is __________=0?
Saturday, February 9, 2008 at 11:00am by Marysvoice

Chemistry
A: A student must make a five-fold dilution of a 2.15 M HCl solution. If the student wishes to make 75.0 mL of the diluted solution, what volume of the 2.15 M solution will he need to dilute? B: What is the concentration of the diluted substance?
Monday, March 21, 2011 at 2:16pm by Anonymous

chemistry Molarity
You have 353 mL of a 1.25 M potassium Chloride solution, but you need to make a 0.50 M potassium Chloride solution. How many milliliters of water must you add to the original 1.25 M solution to make the 0.50 M potassium Chloride solution
Saturday, December 11, 2010 at 2:17pm by Kevin

Math
If a mixture of a 6% acid solution with an 11% solution is to be made, how much of each solution is needed to make 10 liters of an 8% acid solution?
Sunday, September 2, 2012 at 9:40am by DAD

Math Algebra , high school
A biologist has three salt solutions: some 5% solution, some 15% solution, and some 25% solution. She needs to mix some of each to get 50 liters of 20% solution. She wants to us twice as much of the 5% solution as the 15% solution. How much of each solution should she use? How...
Thursday, December 13, 2012 at 10:14pm by Gina

Chemistry
10% (m/m) Sodium Hydroxide solution, NaOH(aq) is used to break down wood fibre to make paper. A) What mass of the solute is needed to make 250mL of 10% (m/m) solution? B) What mass of solvent is needed? C) What is the molar concentration of the solution?
Monday, May 2, 2011 at 9:28am by Saman

ALGEBRA
A chemist is asked to make 10 liters of a a35% solution. She has only a 10% solution and a 50% solution to work with. how much of each solution must she mix to ge 10 liters of the 35% solution?
Saturday, January 28, 2012 at 4:23pm by jackie

Chemistry
If I have to make a solution with sodium bicarbonate (baking soda) how do i find the molarity and how do i correctly make the solution??? i.e. how do i prepare a solution of sodium bicarbonate with a molarity of 0.01?
Tuesday, January 8, 2008 at 7:51pm by Jake

Chemistry
A 2% solution of Hydrochloric acid is required for a procedure. A 5% solution is availabe. How much of the 5% solution will be required to make 1 L of solution?
Tuesday, April 14, 2009 at 8:18pm by Jessi

Chemistry
If you know the molarity of the stock solution..you know how many moles you want. For instance, if you want 0.06M of NaOH of stock solution, 1.400ml of it. So the moles of NaOH in the stock solution will be .06*1.4 = .084 moles. You have 12M conc solution. so you need .084 ...
Friday, October 31, 2008 at 10:12am by bobpursley

Chemistry
1. How would you take 1L of an existing solution with a concentration of 1M and use it to make a new solution of 0.1 M? Be specific. 2. Would it be possible to easily create a 2 M solution from 100 mL of 1 M solution? Explain why or why not?
Wednesday, January 16, 2013 at 10:39pm by Anonymous

CHEMISTRY
1. How would you take 1L of an existing solution with a concentration of 1M and use it to make a new solution of 0.1 M? Be specific. 2. Would it be possible to easily create a 2 M solution from 100 mL of 1 M solution? Explain why or why not?
Wednesday, January 16, 2013 at 7:51pm by Anonymous

Chemistry
You wish to prepare 0.18 M HNO3 from a stock solution of nitric acid that is 18.9 M. How many milliliters of the stock solution do you require to make up 1.00 L of 0.18 M HNO3? Answer and..... HOW DO I DO IT?
Wednesday, October 1, 2008 at 12:38am by Brittany

Chemistry
You wish to prepare 0.18 M HNO3 from a stock solution of nitric acid that is 18.9 M. How many milliliters of the stock solution do you require to make up 1.00 L of 0.18 M HNO3?
Wednesday, October 1, 2008 at 12:02am by Brittany

Chemistry
In each of the following, determine how much solute (in g or mL) must be added to the correct quantity of water to make the given amount of solution at the correct concentration. a)KI to make 50.0mL of a 0.50 M solutioon b)12.0 M HCL to make 500 mL of a 1.0 M HCl c)Sucrose (...
Sunday, May 2, 2010 at 4:20pm by Kim

General Chem lab
Hi, how do I calculate how many grams of unknown diprotic acid are needed to make 150mL of 0.750N (normal) solution? and to make 125mL of 0.500M (molar) solution? we have 0.5000M of NaOH.. Please help me...
Sunday, October 30, 2011 at 3:09am by Ashley

Chemistry
How many moles of HNO3 are required to make 250mL of a 2.4M solution? How many grams of KOH are required to make 125mL of a .50M solution?
Wednesday, March 4, 2009 at 8:43pm by Ali

Chemistry
Calculate the amount of solute needed to make each of the solution: 225g of 10% (m/m) K2CO3 solution .50kg of a 18% (m/m) KOH solution
Friday, May 13, 2011 at 5:58pm by Curlyqty

chemistry
How much of a 100mM solution do I need to add to a 2.5mM solution to make a solution with a final concentration of 10nM? Is there a formula for this? Please HELP!
Thursday, October 21, 2010 at 5:30pm by lisa

Chem
Do my answers look correct for these? Thanks Calculate the mass percent of a solution containing 45.6 grams ethanol (C2H6O) in 245 grams of water. 15.7% You are asked to make 500.0 mL of a 4.5M solution of HCl, but the only HCl you have available to dilute is 18.0M. Describe ...
Monday, December 7, 2009 at 7:29pm by Matt

chemistry
A chemist makes a “stock” solution of KOH by dissolving 1050.0 grams in enough water to make 1.50 liters of solution. If later on the chemist wants to use this stock solution to make 200.0 mL of 0.10 M KOH, what would the chemist need to do? (Define the steps and ...
Friday, May 25, 2012 at 1:30pm by Jim

chemistry
You want each solution to absorb at a specific wavelength that the others two substances have no absorbance. However, IF you have the three spectra and can make standard solution, it IS possible, with a good bit of work, to set up simultaneous equations (or use successive ...
Monday, December 8, 2008 at 11:02pm by DrBob222

chemistry
Make a buffer solution with the following specification pH=5.5 Volume=2L total concentration=1M ... a) Name the components?... b) How many grams of each component would you use to make 2L of solution
Monday, July 25, 2011 at 1:04pm by Anonymous

Chemistry
You make 1.00 L of a buffered solution (pH = 5.10) by mixing propanoic acid and potassium propanoate. You have 1.00 M solutions of each component of the buffered solution. What volume of each solution do you mix to make such a buffered solution? propanoic acid potassium ...
Wednesday, March 13, 2013 at 2:53am by Margaret

Chemistry
Please help me with these! Thanks :) Describe, in detail, how to make 5.5 liters of a 2.5 molar HCl solution from a 10.5 molar HCl stock solution. How many grams of a stock solution that is 85.5 percent H2SO4 by mass would be needed to make 150 grams of a 45.0 percent by mass ...
Sunday, February 27, 2011 at 8:50pm by Amanda

Algebra
|3x+8|=20; -4 Basically that 4 is asking whether that is a possible solution to the problem. I tried to solve it and the two solutions I got were -28/3 and 4. So I got that -4 is not a solution but if someone could check for me and make sure I didn't mess up my signs that ...
Saturday, August 27, 2011 at 2:39pm by Linda

Chemistry
A solution is made by dissolving 18.9 g of HCl in enough water to make 716 mL of solution. Calculate the pH of the solution at 25 degrees C
Wednesday, December 5, 2012 at 10:35pm by Kristen

Chemistry
The question says calculate the mass or volume required to make the following solution. 20mL of a 3% hydrogen peroxide solution from a 30% H2O2 solution.
Wednesday, September 26, 2012 at 5:39pm by John

chemistry
Are you speaking of the stock solution as the solution taken from a 2.5 L bottle of concentrated HCl as sold by commercial supply houses? Probably so. Those solutions are made by dissolving gaseous HCl in water to make a 35-37% solution of HCl. It is approximately 12 M and you...
Sunday, July 25, 2010 at 2:41pm by DrBob222

Honors Chemistry 101
Do my answers look correct for these? Thanks Calculate the mass percent of a solution containing 45.6 grams ethanol (C2H6O) in 245 grams of water. 15.7% You are asked to make 500.0 mL of a 4.5M solution of HCl, but the only HCl you have available to dilute is 18.0M. Describe ...
Monday, December 7, 2009 at 1:46am by Matt

Science
You have a stock solution of 3.5M glucose. You need a working solution of 0.5M glucose in a volume of 400ml. Explain how you make the solution. Also what is the concentration of the dilution solution?
Monday, October 15, 2012 at 10:10am by Helper

Chemistry
A 2.7 M solution of phosphoric acid (H3PO4) is to be reacted with a 7.5 M solution of sodium hydroxide to make sodium phosphate and water. How many L of the H3PO4 solution will react with 0.662 L of the NaOH solution
Wednesday, April 25, 2012 at 10:53pm by John

Chemistry
You need 3.0-L of 0.13 M salt solution. All you can find is 0.40 M salt solution. How much of that solution will you need in order to make your desired solution (in liters)?
Wednesday, February 16, 2011 at 6:06pm by billy

math
A 5% alcohol solution is mixed with 15% alcohol solution to make a 25mlof a 9% solution. How much of each alcohol solution is used?
Monday, October 29, 2007 at 9:13pm by elisa

Chemistry
see same question how many grams nitric acid HNO3 must be dissolved in 350 ml water to make a solution with pH of 4.5"? or "how many ml of a 4.2M nitric acid solution are required to make 500 ml of solution with pH of 2.9
Sunday, May 12, 2013 at 11:29am by kriti

Chemistry
A solution is prepared by dissolving 571.6 g of H 2SO4 in enough water to make 1000.0 mL of solution. The solution has a density of 1.3294 g/mL. (molar mass of H2SO4 = 98.08). What is the molar concentration of the solution?
Sunday, March 24, 2013 at 7:33pm by Bill

chemistry
g)How many grams of agarose are needed to make 100 ml of 2.5% agarose solution?. h) Calculate the volume of buffer to which 500mL of 40 mM potassium chloride solution must be diluted to make a new concentration of 0.001M.
Tuesday, September 13, 2011 at 1:39pm by roshan

biochemistry
If you make up a solution of 100 mL of 0.1 M HEPES in the basic form, what will be the pH? I have no idea where to even start...
Monday, January 30, 2012 at 9:09pm by Sara

ChemistryDrBob222
mL x M = mL x M is the dilution formula. mL of the concd acid is the unknown. M of the concd acid is 18.4 M mL of the diluted solution is 1,000 mL (you want 1.00 L). M of the diluted solution is 5.20M. Solve for the only unknown which is mL of the concd acid you need to use ...
Thursday, January 13, 2011 at 12:15am by DrBob222

math
A nurse needs to make 30 ml of 5% solution of glucose. She has available bottles containing 5 ml of 7% solution and bottles containing 10 ml of 1% solution. How many 5 ml bottles and 10 ml bottles will she need to make the solution? Bottles of 5 ml of 7% solution needed: ...
Monday, March 11, 2013 at 8:40pm by Josh

science
how can i prepare this solution? Dissolve 24.82g of sodium thiosulphate in each cubic decimeter of solution to make astock of 0.1M. Dilute this solution 20-fold. URGENT PLEASE!!!!!!!!!!!!!!!
Tuesday, January 29, 2013 at 8:56am by khumalo

Chemistry
1. How would you take 1L of an existing solution with a concentration of 1M and use it to make a new solution of 0.1 M? Be specific. Tell me the process..... What would you do....ex: I would pour this into that ....... 2. Would it be possible to easily create a 2 M solution ...
Thursday, January 17, 2013 at 9:17pm by Anonymous

chemistry
Supposing the "68%" is 68% by weight: (0.255 L) x (0.150 mol/L) x (63.0130 g/mol) / 0.680 / (1.41 g/ml) = 2.51 ml The direct way would be to take 2.51 ml of the 68% solution and dilute it to exactly 255 mL. But as a practical matter, since measuring 2.51 mL ...
Saturday, July 30, 2011 at 12:31am by james to henry

Chem II
A solution is prepared by dissolving 12.7 g Ca(NO3)2 in enough water to make 100.0 mL of stock solution (molar mass is 164.09-1). What is the molarity of the solution?
Wednesday, January 23, 2013 at 10:08pm by vera

Chemistry - buffers
Two burettes are filled with solutions: one with 0,1OM CH3COOH solution, second with 0,15M CH3COONa. How many milliliters each solution will need to make 20mL of solution, which pH=4.85
Monday, March 26, 2012 at 2:43pm by Anonymous

dorpersnoodle
its just a neatness test make up a story of one it a made up word u could make it into anything u want it to be
Wednesday, August 16, 2006 at 8:01pm by jessica

chemistry
A chemist want to make a 10% Chlorine solution from 30% Chlorine solution and pure water. How much of the two should the chemist mix together to make 20mL. Please help with calculations. Thank you
Friday, August 31, 2012 at 10:53am by kate

algebra
a chemist mixes an 11% alchohol solution with an 8% alchohol solutoins. How many milliliters of each solution should he use to make a 600ml solution that is 8% alchohol solution? Why wouldn't we just use 600ml of the 8% solution to begin with? So 0ml of the 11% and 600ml ...
Tuesday, September 12, 2006 at 6:29pm by nicole

Chemistry
I can't figure out how to set up this problem...You have a large amount of 8.00 M stock solution. You need 1.80L of 3.00 M solution for an experiment. How would you prepare the desired solution without wasting any stock solution?
Wednesday, October 5, 2011 at 10:11am by Nicole

chemistryyyy
A solution is made by dissolving 0.0100 mol of HF in enough water to make 1.00 L of solution. At 23 °C, the osmotic pressure of the solution is 0.308 atm. What is the percent ionization of this acid? Please help.
Sunday, February 19, 2012 at 2:45am by Jake

Algebra 2
Joan has 40 liters of a 25% solution. How many liters of a 60% solution should she add to make a 30% solution?
Sunday, October 18, 2009 at 7:00pm by Trisan

science
Your question does not make sense. Are you making the 2% solution from 2% solution? Or 20% solution? How much are you making? Pay attention to your punctuation and capitalization.
Monday, August 13, 2012 at 9:12am by drwls

chemistry
A solution is made by adding 5.0 g Na2CO3 * 10H2O to enough water to make a 500 mL solution. what is the molarity. I have: M=mol solute/liter solution = (5/286)/.5 = .035M 286 is what i got for the molar mass of Na2CO3 * 10H2O Is that correct?? I think it is, but the next ...
Monday, May 3, 2010 at 7:46pm by Maggie

algebra
a lab technician has a 15% alcohol solution. She wants to make 100 gallons of a 29% solution. How much of the 15% solution should she use?
Wednesday, February 15, 2012 at 7:02pm by matt

chemistry
Hey, I am having a real hard time getting the answers to the problems. Any help would be greatly aprreciated! 1. When 11 mL of a solution containing 2.9 M AlBr3 is diluted to 33 mL, a dilute solution is formed. What is the Br- concentration in 25 mL of the dilute solution? 2. ...
Wednesday, November 7, 2007 at 5:35pm by chelsea

UCI
A student is given a stock solution of 1.54E-04 M. How much stock solution is needed to make 100 mL of a 1.60E-05 M solution?
Friday, April 9, 2010 at 12:17am by Anonymous

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