June 29, 2016

Search: Calculate the solubility (in grams per 100 mL of solution) of magnesium hydroxide in a solution buffered at pH = 12.

Number of results: 73,220

If the reaction 2H2O2 →2H2O+O2 has a 45% yield, what is the molarity of the H2O2 solution if 2.5 L of this solution pro- duces 150 g of O2?
May 29, 2016 by Andrea

Dr. Bob Chemistry question
Ok this is what i got for the grams part now.... Total mass is 20.14 + 51.64 + 11.34 + 15.06 = 98.18 %H2O = (20.14/98.18)*100 = 20.51% %C2O4 = (51.64/98.18)*100 = 52.60% % Fe 3+ = (11.34/98.15) * 100= 11.55% % K + = (15.06/98.15) * 100 = 15.43 % 20.51 g H2O, 52.60 g C2O4 11.55...
May 5, 2008 by LT

A solution prepared by dissolving 3.00 grams of ascorbic acid (vitamin C, C6H8O6), in 50.0 grams of acetic acid has a freezing point that is depressed by T = 1.33 oC below that of pure acetic acid. What is the value of the molar freezing point-depression constant for acetic ...
February 18, 2013 by Ace

How many grams of potassium can be obtained from the decompostion of 100 grams of KCl?
November 11, 2010 by Zach

What will be the concentration if 40 grams of sugar is added to 100 grams of water?
July 24, 2011 by MANALI

No more solute can dissolve in a solution if it is a--------solution.
January 7, 2009 by gay

intermediate algebra
1.(5,1)is a solution to the equation2x-3y=7.what does this mean? 2.(-3,_)ia solution of =4-3x
February 20, 2010 by keke

x^2-7x-98=0 whT is the smaller x solution and the larger x solution
March 29, 2010 by ewrwerwe

Determine whether -4 is a solution of the inequality x>-4 Is -4 a solution?
May 20, 2011 by Tina

what is the molarity of a solution containing 15.0 g of NaCl in 1.25 L of solution?
May 22, 2011 by lucky

the (OH) of ammonia solution is 4.0 x10-2 M. What is the (H3O+) of the solution?
October 21, 2011 by Anonymous

what is the molarity of a solution of the strong base Ca(OH)2 in a solution that has a pH of 10.80?
April 12, 2012 by Sydney

What is the molarity of a solution in which 58 g of NaCl are dissolved in 1.0 L of solution?
May 15, 2012 by adam sam

Solve the equation and check the solution: -4(t+7)-(t+6)=10 the solution t is:
May 16, 2012 by Angela

Does |x^2-3x+3|=3 have a solution? My answer was that there isn't a solution. Am i right?
August 17, 2012 by Unknown.

how ti distinguish NH4OH solution from NaOH solution
October 2, 2012 by bhanu

Consider a 9.5e-10 M solution of HClO4 at 283 K. What is the pH of the solution?
December 7, 2012 by Chris

How do you make 300 ml of a 2M solution from a 50 M stock solution?
February 1, 2013 by Monika

7th grade
if 60 grams of potassium chlorate is dissolved into 100cm3 of water at the temperature of 60 degrees celsius is the solution saturated unsaturated or supersaturated?
February 19, 2010 by sean

What mass (in grams) of potassium acetate, KC2H3O2, must be added to 140 mL of 0.010 M acetic acid to form a buffer solution with a pH of 4.5? (Ka (HC2H3O2)= 1.8 x 10-5)
March 5, 2012 by Anonymous

Ap Chem
how many milliliters of a 0.9 molar HCl solution are needed to react completely with 12 grams of zinc according to the following equation 2HCl+ Zn yields ZnCl2+ H2
September 10, 2012 by Chasm

Phamacy math
One teaspoonful diluted to a quart results in a 1/5000 solution. What is the amount of potassium permanganate in grams required to fill this prescription?
September 21, 2012 by Nick

What is the molarity of a salt solution that is made from 31.0 grams of Ca3(P04)2 placed in a volumetric flask and filled to the 2 liter line with distilled water?
March 18, 2013 by Matt M

A current of 4.00 A is passed through a solution of AgNO3 for 1.00 hr. What mass of silver is deposited at the cathode? (In grams) Use Faraday's constant F = 9.65x10^4 C/mol
January 11, 2015 by Jon

When saccharin is added to pure water, the freezing point of the resulting solution drops to -5.0C, Calculate the freezing point depression of the aqueous saccharin solution. Note: freezing point of pure water is O.0C... Stuck thanks so much!
January 16, 2013 by Lala

A solution contains an unknown mass of dissolved barium ion. When sodium sulfate is added to the solution, a white precipitate forms. The precipitate is filtered and dried and then found to have a mass of 210 mg. What mass of barium was in the original solution? (Assume that ...
October 14, 2015 by Nicole

Hydrochloric acid and sodium hydroxide are mixed together to form salt and water. During the reaction, the temperature of the solution increases. Which of these best explains why this is considered to be a chemical change? No energy was destroyed. Heat was given off. It ...
August 2, 2011 by Anonymous

Please help!!!! Solve each system graphically. Be sure to check your solution. If a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state this. 6x - 2y = 2, 9x - 3y = 1 My answer: Equation 1 X-...
October 11, 2010 by Jordyn

May 15, 2012 by janika

Chemistry(Please help!!)
For a chemistry lab the experiment was to carry out an acid-base titration to determine the exact concentration of a sodium hydroxide solution. Two trials were completed and the data collected was: mass of weighing paper, mass of weighing paper + KHP, mass of KHP, initial ...
October 23, 2011 by Hannah

A 0.753 m solution of the solute CH3CN dissolved in the solvent C6H6 is available. Calculate the mass ( g ) of the solution that must be taken to obtain 3.274 mol of CH3CN. Additional info: Molar Mass (g/mol) CH3CN 41.05 C6H6 78.11 Density ( kg/L ) CH3CN 0.7857 C6H6 0.8786 ...
May 8, 2010 by Kyo

1) Find the solution to the following system of two linear equations, if it has a solution. 2x-y=3, -x+y=1 2Find the solution to the following system of two linear equations, if it has a solution. 2x+y=4, x+3/2y=3
October 13, 2011 by Megan

One has 100.0 grams of water and 45.0 grams of ice in a flask at 0 C. (a) what is the total volume?
March 6, 2010 by Anonymous

If I have 80 grams of NaCl in 100 grams of water at 20 C, is that undersaturated, saturated or oversaturated?
July 10, 2011 by g

A 2.00 ml sample of an aqueous solution of hydrogen peroxide, H2O2 (aq) is treated with an excess of Kl (aq). The liberated I2 requires 12.40 mL of 0.1025 M Na2S2O3, for its titration. Is the H2O2 up to the full strength (3% H2O2 by mass) as an antiseptic solution? Assume the ...
October 12, 2008 by Saira

OKOK I know that I have posted this question but I just don't understand the last part. 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 25C. Calculate the Pb2+ and IO3- concentrations when the mixture comes ...
May 16, 2007 by mel

Caclulate the Ka of nitrous acid if a 0.200 mol/L solution at equilibrium at SATP has a percent ionization of 5.8% ka=(H+)(NO2-)/(HNO2-) If 1.59% ionized then after ionization H+ = 0.2 x 0.058 =? NO2- = 0.2 X 0.058=? HNO2=0.2 x (1.0 - 0.058) If solution is 5.8% ionized, than ...
April 7, 2008 by Dustin

O- chemistry
During a recrystalliztion experiment, a student allows the hot solution to cool to room temperature, then chills the solution in an ice bath. Is the student using correct recrystallization technique? Why does the student not simply chill the hot solution in an ice bath initially?
September 29, 2008 by David

algebra 1
A chemist has one solution containing 30% insecticide and another solution containing 50% insecticide. How much of each solution should the chemist mix to get 200 L of a 42% insecticide? My teacher explained how to set up the problem: 3x+5y=84 x+y=200 what I dont get is why ...
December 4, 2014 by ben

A precipitate will be formed when an aqueous carbonic acid soution is added to what other aqueous solution? A. ammonium chloride B. calcium hydroxide C. Sodium Chloride D. Potassium carbonate E. Nitrous acid
June 19, 2010 by Ellie

thank you! What is the molar concentration of hydroxide ions in a solution with a pH of 6? Find the concentration of H ions first.. [H+]= antilog -ph Then, find [OH-] [OH-]= 1*10^-14/[H+]
June 5, 2007 by Devon

I am in the process of calculating the hydrogen ion concentration in a .25litre solution of sulfuric acid,.21g of sulfuric acid was disolved in water to make the solution. I have calculated the molarity of the acid to be 2.14x10^-3 mol per litre. I also need help in ...
March 5, 2007 by ruby

Methylaime, CH3NH2. If a 0.100 mol/L solution of methyamine has a pH of 11.80, calculate the ionization constant for the weak base. What is an ionization constant. Is it just K? This is what I did so far: 11.80 = -log (concentration of h3o+) 10^-11.80 = (concentration of h3o...
July 23, 2009 by Lena

College algebra
One health club charges a monthly fee of $100 and an extra $5 for every visit. Another health club charges $103 per month and $4 for every visit. How many visits in a month would make the cost of each health club equal? Suppose x is the number of visits per month. Fill in the ...
May 26, 2016 by Brandi

AP Chemistry
In a saturated solution of Zn(OH)2 at 25 degrees Celsius the value of [OH-] is 2.0x10^-6M. What is the value of the solubility-product constant, Ksp, for Zn(OH)2 at 25 degrees Celsius? A. 4x10^-18 B. 8x10^-18 C. 1.6x10^-17 D. 4x10^-12 E. 2x10^-6 Help? Thank you!
March 9, 2010 by Anonymous

how many grams of CaCl2 would be dissolved in 1.9 liters of a 0.2 molarity solution of CaCl2?
January 13, 2010 by q

How many grams of CuSO4 .5H2O are needed to prepare 50 ml of 0.30M CuSO4 solution
March 7, 2010 by kesiha

How many grams of K2SO4 would you need to prepare 1500 g of 5.0% K2SO4 (m/m) solution?
April 26, 2010 by Jack

How many grams of NiSO4*6H2O are needed to prepare 200*10^2 mL of a 3.5*10^-2 M NiSO4 solution?
February 15, 2011 by Mattie

How many grams of MgCl2 are required to make 350mL of a 0.56M solution of MgCl2?
February 28, 2011 by Jose

How many grams of HCl must be added to make 1 liter of a 2.0 M HCl solution
June 23, 2011 by Chris

Chemistry 101 college
How many grams of chloride ions are in a 2.5L of a 1.0 M calcium chloride solution?
July 19, 2011 by Katie

How many grams of chlorine are needed to make 5.00 X 10^6 g of a solution that is 1.50 ppm chlorine by mass?
December 5, 2011 by Sam

more math needed
You have a 70% dextrose solution. How many grams of dextrose are in 400ml?
February 24, 2012 by Vicki

Gen. Chem 1
The density of 18% nh4cl is 1.05 grams/ml. What mass of nh4cl is in 425 ml of the solution?
March 19, 2012 by Zack

How grams of NACL are present in a 250-g solution containing 9% NACL?
June 24, 2012 by sharlyn baquita

To make some solution 500mL H2SO4 0.3 M. How many grams of H2SO4 are used?
July 31, 2012 by Natya

How many grams of HCL must be added to make 1 liter of a 2.0 M HCl solution?
September 27, 2012 by Rachael

How many grams of HCL must be added to make 1 liter of a 2.0 M HCl solution?
September 27, 2012 by Rachael

How many grams of KBR, could be recovered by evaporating 650 g of a 15.0% KBr solution of dryness?
November 21, 2012 by tracy

How many grams of CuCl2 are required to prepare 1270. g of a 1.75% (by mass) CuCl2 solution?
December 2, 2012 by John

How many grams of AgNO3 (silver nitrate) are contained in 425 mL of a .15 M solution of AgNO3?
January 29, 2013 by Jessica

how many grams of cacl2 are needed to prepare 6.00L of a 0.400M CaCl2 solution
May 30, 2015 by jen

How many grams of (Bef2) are present in 655ml of a 0.442 M solution of (BeF2) Please help
June 21, 2015 by Ocean

how many grams of KIO3 are needed to make 50.0 mL of a 1.2 M KIO3 solution
January 17, 2010 by Anonymous

what mass of a 15% (m/m) NaOH solution contains 125 grams NaOH?
August 19, 2010 by Anonymous

how many grams of NaOH do you need to prepare a 3.00 x 10^2 mL stock solution of 2.00 M NaOH
October 7, 2010 by jane

How many grams of NaBr are contained in 85.0 mL of a 2.10 M NaBr solution? I'm not sure how to go about this..
December 1, 2010 by Roxie

How many grams of Li2SO4 are needed to prepare 250.0 mL of a 4.0% m/v Li2SO4 solution?
April 30, 2011 by Debbie

How many grams of NaCl are neeeded to make 100ml of a 2M solution of NaCl
July 13, 2011 by corinna

To produce 3.00 L of a 1.9 M solution of NaOH, how many grams of NaOH must be dissolved?
April 11, 2012 by Jessica

How many grams of sucrose are needed to make 875 mL of a 39.0% (w/v) sucrose solution?
January 27, 2013 by Chemistry

If 45g of a 2.2% NaHCo3 solution is to be prepared how many grams of NaHCo3 are needed
April 16, 2013 by Karla

How many grams of methanol, CH3OH, are there in 150.0 mL of a 0.30 M aqueous solution of methanol
November 4, 2013 by mary

How many grams of glucose are needed to make 500ml of a 3.0M solution of glucose?
January 15, 2015 by Anonymous

How many grams of sucrose (C12H22O11) are in 2.50L of 0.710M sucrose solution?
April 1, 2015 by Samantha

How many grams of KBr are contained in 200 mL of a 0.310M KBr solution?
May 27, 2015 by Lauren

How many grams of NaOH are needed to make 450mL of a 2.5%(m/v) NaOH solution?
July 1, 2015 by Telimm

how many grams of NaOH do you need to prepare a 3.00 x 10^2 mL stock solution of 2.00 M NaOH
October 7, 2015 by Alexander

50.0 mL of a solution of HCl is combined with 100.0 mL of 1.15 M NaOH in a calorimeter. The reaction mixture is initially at 22.4C and the final temperature after reaction is 31.2C. What is the molarity of the HCl solution? You may assume that there is an excess of base (so ...
February 28, 2015 by Marcus

A consumer electronics company sells 6.7 million MP3 players per month at a price of $100 apiece; when the price is lowered to $80, the company sells 10.2 million players per month. How many MP3 players can the company expect to sell per month at a price of $75? (100, 6.7) and...
February 26, 2011 by bianca

calculate the number of grams of glycerol, C3H5(OH)3 (MW=92.1 g/mol), that must be dissolved in 520 grams of water to raise the boiling point to 102.00 degrees Celsius. this whole chapter really lost me. delta T = Kb*molality delta T = 2 degrees. Kb = boiling point elevation ...
April 21, 2007 by chris

Calculate how much K3Fe(CN)6 [MW: 329.24] you would need to weigh out to make a 1x10-3 M solution dissolved in 0.2 M NaNO3 in a 100 ml volumetric so far i have worked out that 0.329 g will give me the 1x10-3 M, but im confused when it is dissolved into the NaNO3.
October 8, 2014 by QJ

Acetic acid is a polar molecule and can form hydrogen bonds with molecules. Therefore, it has a high soulubility in water. Yet acetic acid is also soluble in benzene (C6H6), a nonpolar solvent that lacks the ability to form hydrogen bonds. A solution of 3.8g of CH2COOH in 80 g...
October 18, 2010 by Karly

1. Imagine you have a saturated solution of Ca(OH)2, at equilibrium, that has some undissolved Ca(OH)2 precipitated on the bottom of the test tube. If you add an additional scoop of Ca(OH)2 to the solution will concentration of [OH-] in the solution (increase, decrease, or be ...
March 16, 2015 by Caroline

Assuming an efficiency of 38.60%, calculate the actual yield of magnesium nitrate formed from 145.9 g of magnesium and excess copper(II) nitrate. I got 230.5g but it isn't right.. I got 6 mols of Mg then calculated molar mass of Mg(NO3)2 and got 148.31 and then multiplied the ...
April 22, 2014 by Clare

A solution was made by dissolving 5.15 mg of hemoglobin in water to give final volume of 1.00 mL. The osmotic pressure of this solution was 1.97 x 10^-3 atm at 25C. Calculate the molar mass of hemoglobin. pi = iMRT i = 1 since hemoglobin is nonelectrolyte and doesn't ...
September 14, 2012 by Wiped Out

We did a LAB where we used a spectrophotometer to measure the absornency of a solution. It was a bluish color, so the question is.... What could be done to modify this experiment if the original solution was colorless? HINT: you can NOT add a coloring agent such as food ...
March 11, 2009 by jaseline

calculus maths
Hi can some one help, explain the following please. I seem to have issues with this: 1- Find the corresponding particular solution (in implicit form) that satisfies the initial; condition y = when x = 0. 2- Find the explicit form of this particular solution. 3- What is the ...
February 15, 2011 by Claire

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

How many grams of CH3OH must be added to water to prepare 420.0 mL of a solution that is 5.0 M CH3OH?
March 10, 2010 by Camarra

How many grams of cadmium must react to displace 13.0 g of copper from a solution of copper nitrate?
October 12, 2010 by tata

How many grams of cadmium must react to displace 13.0 g of copper from a solution of copper nitrate?
October 12, 2010 by tata

what is the number of grams needed to prepare a 1.23 M solution of nitric acid if 250.0 mL are needed?
May 19, 2011 by Anonymous

What mass of KNO3 in grams would be required to prepare 0.6 liters of a 1.8 M KNO3 solution?
November 29, 2011 by Megan

how many grams of NaOCl are in 12.14 mL of a 6.65% (wt./vol.) NaOCl solution? Please help me set this up... I have no idea what to do.
February 1, 2012 by Seerat

To prepare 100g of 19.7% by weight solution of many grams each of NaOH and H2O are needed?
June 21, 2014 by akhmal

How many grams of CH3SH must be added to water to prepare 410mL of a solution that is 2.5 M CH3SH?
November 4, 2014 by Eli

How many grams of chlorine gas are needed to make 5.40 x 10 6 g or a solution that is 1.40 ppm chlorine by mass?
November 5, 2014 by Dustin

How many grams of Fe(NO3)2 are present in 555mL of a 0.650 M solution of Fe(NO3)2?? I have no clue what to do??
June 21, 2015 by Ocean

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