November 25, 2015

Search: prepare 250.0mL of a 0.500M solution of NaCl

Number of results: 25,331

Problem: Need to prepare a 250 mL buffer of pH 7.00 using equimolar K2HPO4 and KH2PO4 solutions. Ka for phosphoric acid: Ka1=7.2 x 10^-3 Ka2=6.3 x 10^-8 Ka3=4.2 x 10^-13 I though the hard part of this was picking the right equation/Ka value, but I am not getting the right ...
February 22, 2015 by lauraK

Could someone help me with these problems; A)If 5.97mL of a solution of NaCl contains 2.54g of sodium ion, what is the molarity of the sodium chloride solution? -I know M=#moles solute/L but when I do this I get 7.28*10^-3 which is wrong, the answer should be 1.85*10^-2 B) ...
January 28, 2011 by Adam

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?
October 1, 2008 by Brittany

What volume of a 2.5 M stock solution of acetic acid (HC¿HÀO¿) is required to prepare 100.0 milliliters of a 0.50 M acetic acid solution?
May 10, 2012 by pat

What volume of a 2.5 M stock solution of acetic acid (HC2H3O2) is required to prepare 100.0 milliliters of a 0.50 M acetic acid solution?
June 19, 2012 by nhfgchnr

What volume of a 2.5 M stock solution of acetic acid (HC2H3O2) is required to prepare 100.0 milliliters of a 0.50 M acetic acid solution?
September 6, 2013 by delacia

What volume of a 2.5 M stock solution of acetic acid (HC2H3O2) is required to prepare 100.0 milliliters of a 0.50 M acetic acid solution?
September 12, 2013 by delacia

Calculate the pH of the following buffer solutions: a) a solution made by dissolving 2.733g KH2PO4 and 4.508g K2HPO4 in water to give 250 ml of solution. b)a solution made by mixing 35.00 ml 0.24 M C6H5NH2 with 15.00 ml 0.19 M C6H5NH3CL. The base dissociation constant Kb is 4....
February 8, 2012 by Karie

A 1.10g- sample contains only glucose and sucrose . When the sample is dissolved in water to a total solution volume of 25.0ML , the osmotic pressure of the solution is 3.78atm at 298K a.What is the percent by mass of glucose in the sample? b.What is the percent by mass of ...
January 24, 2010 by bf

7. A few drops of bromothymol blue indicator are placed into 250 mL of 0.20 mol/L HCl(aq). A sample of 1.8 g of NaOH(s) is then dissolved into this solution. The final colour of the solution is predicted to be How can I do this one? What is the pH of the HCl solution? THen, ...
August 4, 2006 by Bobby

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?
January 8, 2008 by Jake

HELP!! Describe how to prepare 800 ml of a 0.100 M potassium acetate buffer, pH = 4.46 (n.b. pKacetic acid = 4.76). You have glacial acetic acid (17.6 M), a 1.000 M solution of KOH and a 1.000 M solution of HCl.
December 18, 2011 by Jerrica

How would you prepare 500.0 of an aqueous solution of glycerol with a vapor pressure of 24.8mm Hg at 26 degree Celsius (vapor pressure of pure water=25.21mm Hg)? assume the density of the solution to be 1.00 g/mL.
September 10, 2012 by Kris

A student wishes to prepare 1.000 g of silver chromate. How many mL of .05000M silver nitrate solution should be added to 50.00 mL of .0700M potassium chromate solution assuming 100% yield
September 25, 2012 by mom

A stock solution was prepared by dissolving exactly 0.4000 g of pure ASA (180.16 g/mol) in 10.00 mL of NaOH and heating the solution to a gentle boil. After cooling to room temperature, the solution was poured into a 250-mL volumetric flask and diluted to the mark with DI ...
January 28, 2010 by Tasha

A cylinder has a radius of 5 in. If the volume of the cylinder is 250 pie inches cubed, What is the height of the cylinder? pi*r^2*h=250*pi pi cancels. solve for h r^2*h=250 h=250/r^2?? This is what I got originally. 250=pie(5)squared *h. 250= pie 25 h 10= pie h h= 10 over pie...
January 18, 2007 by peggy

Calculate the concentration, in percent by mass, of a refrigerant brine solution which is 4.03 M in NaCl with a density of 1.116 g mL-1.
November 9, 2007 by keely

stoichiometry problems
How many grams of NaCl with a molar mass of 58.44 would be needed to make 2.5 L of 0.00500 solution?
November 23, 2008 by Cindy

What mass of NaCl is required to precipitate all the silver ions from 19.2 mL of 0.100 M AgNO3 solution?
March 19, 2011 by Sara

What mass of NaCl is needed to precipitate all the silver ions from 20.0 mL of 0.100 M AgNO3 solution?
October 13, 2011 by Joe

The molarity of a solution prepared by dissolving 15.0 grams of NaCl in 100 mL water is 0.15 M. True or False
December 5, 2011 by Anonymous

How many moles of sodium chloride (NaCl) solute are in 155 grams of an 85.5 percent by mass solution?
January 17, 2012 by bryan

x gm og Ag was dissolved in HNO3 and the solution was treated with excess of NaCl when 2.87 g of AgCl was precipitated. find the value of x?
May 17, 2012 by aayushi

what is the molarity of Cl in a 100ml solution containing 20g NaCl, 10g CaCl2, and 15g KCl
January 26, 2013 by oluchi

A solution contains 80.0 g of sodium chloride and 400.0 g of water. Calculate the NaCl as a mass percentage
June 2, 2013 by Monica

How much water is neede to add to 60ml of 10% NaCl, density 1.05g/ml to obtain 4% solution
June 29, 2013 by Anonymous

In comparing normal blood concentrations are the solution 0.01% (m/v) NaCl isotonic, hypertonic, or hypotonic and could you explain?
August 9, 2013 by veronica, rena, joshua

In comparing normal blood concentrations are the solution 0.01% (m/v) NaCl isotonic, hypertonic, or hypotonic and could you explain?
August 9, 2013 by veronica, rena, joshua

What does 0.053 M NaCl mean? How many grams of sodium chloride are needed to make 5.0 liters of this solution?
November 29, 2014 by Anonymous

HCl is a strong acid and ionizes 100%. NaOH is a strong base and ionizes 100%. We have no way of knowing the pH of HCl + H2O because the problem doesn't state the amount of HCl added or the concentration of HCl. For the NaOH + HCl ==> NaCl + HOH. NaCl in water is a neutral ...
May 15, 2007 by DrBob222

(I am a mom trying to help my child had Chem years ago if I can see how this is doNE I can explain it to them) You have 70.0mL of a .400M stock solution that must be diluted to .100M. How much water should I add?
July 18, 2015 by Kristina

What preperation produces a 2.0 Mole solution of C6H12O6? a) 90.0 grams of C6H12O6 dissolved in 500.0 mL of solution b) 180.0 grams of C6H12O6 dissolved in 1000mL of solution c) 90 Grams of C6H12O6 dissolved in 1000mL of solution D) 180.0 Grams of C6H12O6 dissolved in 500.0mL ...
December 19, 2012 by D

0.1276 of a monoprotic acid (molar mass 110g/mol) was dissolved in 25ml of water.The pH of the solution was found to be 5.87 after the addition of 10.0ml of 0.0633 M NaOH.The Ka of acid is.......................
April 18, 2010 by tete

How many moles of NaCl are in 16.0 grams of NaCl?
June 19, 2010 by kourtney

e) This equation illustrates your remaining funds after paying for rent and utilities. How much money is left? Explain how you arrived at your answer. $38,250 + $80,000+ $22,250-0.25($80,000 + $38,250)
December 15, 2009 by esse

For the chemical reaction, sodium hydroxide + copper (II) chloride = "robin's egg blue" precipitate, do the following: write the balanced molecular, balanced total ionic, and balanced net ionic equations; determine the Limiting Reactant (LR) for each chemical reaction, ...
November 1, 2015 by Anonymous

describe how you would prepare from the specified stock solution: 400 mL of 0.45 M urea starting with a 6 M urea stock solution
July 24, 2011 by luv2swim

pharmacy math
RX Potassium Chloride 3:5 solution 30ml. how many millimeters of a potassium chloride 2:5 solution do you need to prepare the order?
August 12, 2012 by cleondra

pharmacy math
Rx Potassium 2:5 Chloride solution 30ml. How many milliliters of a potassium chloride 3:5 solution do you need to prepare the order?
March 3, 2014 by Anonymous

Clinical chemistry
Prepare a 10 percent solution of sulphuric acid from a 98 percent stock solution of the acid in a 500mls beaker
November 9, 2014 by Lowicy

CHEMISTRY..please help..thanks
Calculate the new molarity if each of the following dilutions is made. Assume the volumes are additive. (a) 52.3 mL of water is added to 27.1 mL of 0.124 M KOH solution (b) 110. mL of water is added to 54.2 mL of 0.808 M NaCl solution ((please show work, thank u so much)
November 10, 2010 by Jasmin

what is the theoretical mole ratio- NaCl to NaHCO3 How do you determine the percentage error of an experimental mole ratio It would be easier for us to help you if we had the entire problem instead of just parts of it. However, from the standpoint of Na, the mole ratio of NaCl...
January 2, 2007 by CHEMISTRY HELP

Specifications for lactated Ringer's solution, which is used for intravenous (IV) injections, are as follows for each 100mL of solution: 285-315 mg NA+ 14.1 - 17.3 mg K+ 4.9 - 6.0 mg Ca2+ 368 - 408 mg Cl 231 - 261 mg lactate, C3H5O3 How would you make this solution if you have...
August 30, 2011 by Kevin

the density of water 20 degrees celcius is 1.00g?mL and the densityof ethylene glycol is 1.114g/mL, if 100.0mL if water is combined with 25.0mL is ethylene glycol, what would be the density of this mixture?
October 17, 2012 by mat

how would you prepare 300 ml of a 10% CaCl2 solution (w/w)?
November 29, 2011 by erin

how would you prepare 300 ml of a 10% CaCl2 solution (w/w)?
November 29, 2011 by erin

How to prepare a 750mL stock solution with a 0.40 M Na2S2O3.
September 25, 2012 by GoodinChem619

How many moles of hno3 neede to prepare 7.5 l of a 5.6m solution
March 19, 2013 by krystal

How many grams of NaOh are needed to prepare 0.5l of a 4m solution?
June 10, 2013 by Keymaurie

how to prepare 100.0 ml of 0.2 M solution of sodium hydroxide
March 10, 2015 by Allison

How to prepare a 500ml 0.2M NaOH solution from 2.0M NaOH solution
July 10, 2013 by RICHARD

Which of the following pairs would make a good buffer solution in an aqueous solution? A) H2SO4 and NaHSO4 B) Ca(NO3)2 and HNO3 C) HCl and NaCl D) HF and NaOH E) none of them I know the answer is D but I don't understand why. I would think it would be C since a goo buffer is a...
March 20, 2013 by Jonah

Hg2+ + 2Cl- → HgCl Mercuric nitrate was standardized by titrating a solution containing 147.6 mg of NaCl(FM 58.44), which required 28.06 ml of Hg(No3)2 solution. Part a: Find the molarity of Hg(No3)2. I already calculated the molarity to be 0.04500 M Part b: When the ...
October 16, 2011 by Asuna

Suppose you tired to carry out a double-replacement reaction by mixing together equal volumes of a solution that contained dissolved NaF and a solution that contained dissolved NaCl. Would you expect a reaction, if so write the balanced chemical equation?
April 25, 2011 by Anonymous

Suppose you tired to carry out a double-replacement reaction by mixing together equal volumes of a solution that contained dissolved NaF and a solution that contained dissolved NaCl. Would you expect a reaction, if so write the balanced chemical equation?
January 29, 2015 by Keely

In a lab we are trying to find the percent yield of NaCl collected after evaporating the water off an NaCl solution. We made up a .100 M NaCl solution, and used 10. mL of it in our experiment. We know that the empty evaporating dish and cover mass 68.9132 +/- .0003 g, and ...
October 9, 2006 by Chris

pepsin is an enzyme involved in the process of digestion. its molar mass is about 3.50 x 10^-4 g/mol. what is thr osmotic pressure in mm Hg at 30 degree oC of a 0.400g sample of pepsin in 55.0mL of an aqueous solution?
August 26, 2014 by mickey

CHemistry Please Help..............LAB
Standardization of the Sodium Thiosulfate Solution Make up a standard solution of potassium iodate by accurately “weighing by difference” about 0.1 g of KIO3 and placing it in your 100 mL volumetric flask. Fill the flask to mark with distilled water. Potassium iodate reacts ...
October 19, 2008 by Sara

A chemist dissolves 0.097 g of CuSO4 · 5 H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 13.6-mL sample of this solution is then transferred to a second 500-mL volumetric flask and diluted. What is the molarity of CuSO4 in the second solution...
April 14, 2015 by Anonymous

How do I find the molarity of NaCl for different dilutions? You calculate the number of moles per liter of solution.
April 8, 2007 by Colleen

Which solution would increase the osmotic pressure of water the most? a) KBr b) NaCl c) MgCl2 d) glucose
May 19, 2008 by Donna

Hi please help with this. You will mix 5 ml of each 2M HCL and 2M NaOH solutions, calculate the concentration of NaCl formed in the new solution?
October 17, 2010 by John

college chemistry
Followed by the total volume. Calculate the molarity of this solution: 0.521 mol NaCl;125 mL
April 16, 2012 by michelle

Minimum elevation in boiling point is given by a solution of 1. 0.1M Urea 2. 0.1 NaCL 3. 0.1 Mgcl2 4. 0.1M AL2(So4)3
April 10, 2014 by Raghavendra

Explain how you woud make 200.0 g of a .900 percent by mass solution of salt (NaCl in water)
April 16, 2014 by Jakub

what is the procedure for determining the boiling point of 1 M solution of sugar,urea,glucose,NaCl,BaCl2,AlCl3
November 5, 2014 by mrunal

You have been asked to do a dilution of a copper sulfate solution. The solution to be diluted is 2.88 M copper sulfate. What volume of the 2.88 M copper sulfate is required to make 250 mL of 1.03 M copper sulfate solution?
April 10, 2014 by Anonymous

How do we prepare 500mL of 0.5 percent w/v solution of NaOH if we have stock solution of 50 percent w/v NaOH on hand?
October 12, 2012 by Stacy

how would you prepare 445 grams of solution containing 13% mass HCL from 34.1 mass % of HCL solution
February 24, 2014 by SDW

Potassium 2:5 Chloride solution 30ml. How many milliliters of a potassium chloride 3:5 solution do you need to prepare the order?
July 28, 2014 by chi

Find the volume of a 2.5 M solution of sulfuric acid required to prepare 300.0 mL of 0.1 N solution of sulfuric acid
October 7, 2015 by Cole

College Chemistry (DrBob222)
You have 120.0 mL of a 0.245 M solution of NaCl in an open beaker. After several days, you test the solution and find that it now has a concentration of 0.348 M. How much water must have evaporated from the beaker given the new concentration?
March 25, 2014 by Anonymous

I have to prepare a 0.2% water solution of n-propanol and a water solution of methanol and isopropanol at 0.2% that can be in the same container. It didn't specify but I'm pretty sure the solutions are v/v%. For the n-propanol a 0.2% solution should just be 2mg/mL of solution ...
February 2, 2014 by making solutions

calculate the change in pH when 9.00ml of 0.100M HCl(aq) is added to 100.0mL of a buffer solution that is 0.100M in NH3(aq) and 0.100M NH4Cl(aq). ...Calculate the change in pH when 9.00,L if 0.100M NaOH(aq) is added to the original buffer solution.
October 28, 2012 by mike

You are asked to prepare a pH=4.00 buffer starting from 1.50 L of 0.0200 \; M solution of benzoic acid C_6 H_5COOH and an excess of sodium benzoate C_ H_5 COONa. How many grams of sodium benzoate should be added to prepare the buffer? Neglect the small volume change that ...
November 22, 2012 by Josh G.

What is the pH of a sodium acetate solution prepared by adding 0.820g of sodium acetate to 100.0mL of water at 25 degrees?
March 29, 2011 by Natalie

If you add 50 g of sylvite in 100 ml of water at 60 ° C, the resulting solution will she unsaturated, saturated or supersaturated? You prepare a solution and you add 50 g of potassium nitrate to 100 ml of water at 50 ° C. What type of solution are you prepared? Ammonia is a ...
February 8, 2011 by Kay

determine the molarity of a solution of silver nitrate prepared by dissolving 5g of silver nitrate in 25.0mL of water
September 1, 2015 by Morgan

Choices: True,False. Select all that are True. The pH at the equivalence point of a weak base with a strong acid is expected to be less than 7 because of the presentce of the conjugated acid in the water. One cannot prepare a buffer from a strong acid and its conjugated base, ...
November 26, 2011 by paul

If the same solute is dissolved in two different solvents to the same concentration and the same temperature, the osmotic pressure ____ My answer & reason: solution A has a smaller molecular weight and therefore, a larger Molarity and higher osmotic pressure (pi=iMRT) ...
February 25, 2009 by Anonymous

A dilute aqueous solution of an organic compound soluble in water is formed by dissolving 2.35 g of the compound in water to form 0.250 L solution. The resulting solution has an osmotic pressure of 0.605 atm at 25 Celsius. Assuming that the organic compound is a nonelectrolyte...
February 6, 2012 by Jeremy

Physical Science
24. What happens when a solution of nitric acid (HNO3) is added to a solution of potassium hydroxide (KOH)? What are the products? 25. Which of the following compounds can react with H2SO4 to form a salt: NaCl, Ca(OH)2, HF, AlCl3, H2O, Mg(OH)2? Name the salt(s) that would form...
October 15, 2013 by Alexandra

Calculate the heat of solution of LiOH if addition of 25.0g of LiOH causes the temperature of 120.0ml of water to rise from 20.0 celcius to 29.0 celcius.
January 25, 2013 by Aditi

how would you prepare a 500 mL of 0.020M KMnO4 solution?
October 24, 2009 by tumcee

how many grams of 5%NaNO3 will be required to prepare 250ml solution
August 7, 2010 by amruta

February 8, 2011 by PORSHA

how will u prepare 500g of aqueos solution which is 10% NaOH by mass?(%W/W)
March 4, 2011 by yui

what is the mass of CuS04 needed to prepare a 125ml solution of 3.5M?
March 7, 2011 by kjkajkjujo

how to prepare 280 ml of a 27% v/v solution of ethanol, C2H6O in water
April 10, 2011 by lisette

Chemistry 106
How would you prepare 1.00 liter of a 0.18 M solution of NaOh?
April 11, 2011 by Lexi

describe a prepare a 0.25 L.0.5 mol standart solution of NaoH
August 6, 2012 by bihah bi

What mass of KBr is required to prepare 8.oo L of .400 M solution?
September 10, 2012 by Nicole

How do you prepare 500mL of a 2.5M solution of NaOH from the solid compound?
December 9, 2012 by Cassie

how many grams of CuSO4.5H2O is needed to prepare 0.01 M solution?
March 4, 2015 by Anonymous

How many moles of li2so4 is required to prepare 300ml of a 0.5 m solution
March 31, 2015 by ernstcia

describe how you would prepare 500mL of 0.25 M NaNO3 solution?
July 4, 2015 by siti

St. Louise's Inclusive Secondary School
How to prepare 0.5m solution of HCL
September 29, 2015 by Mfonobong gabriel

how we prepare 0.5 mol of solution of hcl in 70ml in water
November 15, 2015 by asif

determine the mass of a 50.0mL sample of your salt solution. Report the mass as a number and use all lower case letters to spell out the word(s) in the unit(s). y = 1.049 x + 0.096
May 28, 2012 by Elias

Chemistry 104
A student has 10.0mL of phosphate solution that contains 1.0M PO4{3-}.The Student reacts this with excess ammonium & magnesium under basic conditions to produce 2.2034g of struvite. Calculate the % yield.
October 2, 2014 by Samantha

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