# Calculate the pH of the solute in an aqueous solution of 0.0047 M codeine, if the pKa of itsconjugate acid is 8.21. What is the percentage protonation of the solute?

46,915 questions, page 185-
## Science

How many kilos of ammonia (N1H2)are contained in 600L of a solution that is8% NC13 by volume

*asked by Carrisse on July 16, 2013* -
## Math - derivatives of cos and sin fucntions

a) Find an equation of a line that is tangent to y=2sinx and whose slope is a maximum value. b) Is there more than one solution? Explain.

*asked by Farah on November 6, 2010* -
## Chemistry

What is the pH of a 0.40 mol L^-1 H2Se solution that has the stepwise dissociation constants Ka1 = 1.3 × 10^-4 and Ka2 = 1.0 x 10^-11 ? Thanks in advance

*asked by Elaina on June 21, 2015* -
## analytical chemistry

What weight of potassium acid phthalate(KHC8H4O4) is required to react with 25 ml OF 0.5N NaOH solution

*asked by jeslf on April 28, 2015* -
## Calculus

Find the unique solution to the differential equation y"?1y'?6y=?24(t^2)+10t+41 satisfying the initial conditions y(0)=?6 and y'(0)=?26

*asked by Hannah on December 3, 2010* -
## Chemistry

To make the following saline solution(375ml 0.5%w/v sodium chloride) what would you weight out? what volume of water would you use?

*asked by Danny on October 22, 2010* -
## chemistry

when zinc graurles are dipped in copper sulphate solution write balance equation?

*asked by swati on May 10, 2016* -
## 10th grade algebra

How many kg of pure salt must be added to 8 kg of a 30% solution to obtain a 35% soltution? Round to the nearest tenth.

*asked by natalie on November 12, 2009* -
## Calculus

(1 pt) Find the unique solution to the differential equation y"?5y'+6y=?312sin(2t) satisfying the initial conditions y(0)=?31 and y'(0)=?18

*asked by Hannah on December 3, 2010* -
## chemistry

When the following reaction is balanced in acid solution, the coefficient of H+(aq) will be: Cr2O72-(aq) + Sn2+(aq) --> Cr3+(aq) + Sn4+(aq)

*asked by Becca on March 22, 2012* -
## Chemistry

if a flask of 750 ml of 0.80m of nacl solution was left, and 275 ml evaporated, what is the new concentration

*asked by vikki on June 2, 2017* -
## Math

solve using the multiplication principle. don't forget to perform a check. 12x=-96 the solution is x=

*asked by Tom on September 27, 2009* -
## Chemistry

Determine the amount of potassium chloride in each of the following solutions: 44mg of a solution containing 15% KCl by mass.

*asked by Kelsey G on November 30, 2010* -
## Chemistry

Determine the amount of potassium chloride in each of the following solutions: 22.2kg of a solution containing 17.2% KCl by mass.

*asked by Kelsey G on November 30, 2010* -
## Algebra

Solve the following systems of equations using the addition (elimination) method. What type of system is it? Name the solution if there is one. 13. x+y=6 x-y=4

*asked by Steveo on March 2, 2014* -
## Chemistry

Determine the hydronium ion concentration in a solution that is 0.00042M HCL Answer in units of M.

*asked by Raven on May 8, 2017* -
## algebra

Find the missing coordinate to complete the ordered-pair solution to the given linear equation. y=5x+4

*asked by linda on September 28, 2017* -
## College Algebra

Show all work solve the Polynomial inequality and express the solution in set notation. (3p-2p^2)/(4-p^2)

*asked by Liz on October 18, 2011* -
## Chemistry

Need help with problem (Molarity) How many grams of NaOH are required to prepare 500.0mL of a 2.00 M solution?

*asked by JOY on March 19, 2013* -
## physical sciences(chemistry)

Explain why solution turns blue by referring to the relative strength of oxidising agent?

*asked by Xalati on July 6, 2015* -
## chemistry

what mass of potassium chloride is required to prepare 5.00L of a 2.00M solution of KCL

*asked by TROUBLED on October 24, 2011* -
## University of Liberia Chemistry 102

Using a current of 4.75A how many minutes does it takes to plate onto a sculpture 1.50g of CuSO4 solution?

*asked by James on June 29, 2016* -
## Chemistry

What's the resulting solution if 2000cm3 of 1MH2S04 is mixed with 20cm3 of 1M NaOH? i got 0.5M,acidic in concentration.

*asked by Jonathan on March 10, 2017* -
## maths

find the general solution of the following first order differential equation. u(t): du/dt = u /t+2t pls show all working

*asked by Zane on October 26, 2011* -
## Chemistry

What mass of NaCl is needed to precipitate all the silver ions from 20.0 mL of 0.100 M AgNO3 solution?

*asked by Joe on October 13, 2011* -
## math

Can someone please explain this problem Find the general solution to the linear system of differential equations. x'1 x'2 x'3 = −4 −4 5 0 −4 4 0 4 2 x1 x2 x3

*asked by Anonymous on April 25, 2015* -
## Chemistry 104

Nitric acid, HNO3, is available commercially at a concentration of 16 M. What volume would you use to prepare 770 mL of a 0.19 M solution?

*asked by Brenna on November 11, 2010* -
## Math

What the base b1 of an Isosceles trapezoid if b2=57ft,h=17ft6inches and both legs are 23ft? or the formula for the solution?thank you.

*asked by Jason on November 18, 2011* -
## Chemistry

What volume of a 0.578 M potassium hydroxide solution is needed to exactly neutralize 3.26 grams of KHP ?

*asked by Anonymous on October 21, 2011* -
## chemistry

if you have 100 ml each of 1.0 m solutions of NaCl,KCl, and CaCl2 which solution would have the largest mass? explain..

*asked by lilly on April 28, 2011* -
## Physics

what is the mass of hydrogen peroixide, H2O2, in 350 grams ofa 20% by weight solution?

*asked by Doly V on December 4, 2009* -
## chemistry

If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-liter solution, what is the resulting molarity?

*asked by smith on November 28, 2010* -
## math

which ordered pair is a solution to the equation y = 3x + 4. I just can't figure it out. I have been working on this problem for over an hour. Please help me with the steps

*asked by Jay on April 11, 2015* -
## science

what can happen to unhomogenized milk if left to stand is this an example of a mechanical mexture, solution or suspension?

*asked by jenna on June 21, 2006* -
## mathematics

find the general solution of the following first order differential equation. u(t): du/dt =(u/(t+2t)) pls show all working

*asked by Zane on October 26, 2011* -
## Math

For the following equations, write a word problem draw a picture, and find the solution to the equation: 5/12 - 1/3= 1/2 - 2/3=

*asked by Anonymous on October 9, 2009* -
## Chemistry

What volume of a 0.578 M potassium hydroxide solution is needed to exactly neutralize 3.26 grams of KHP ?

*asked by Anonymous on October 21, 2011* -
## Chemistry

What volume of a 0.578 M potassium hydroxide solution is needed to exactly neutralize 3.26 grams of KHP ?

*asked by Anonymous on October 21, 2011* -
## Chemistry

I have 500 mL of a 6.0 M solution that I want diluted down to 2 M. How many mL of water should I add to the solutiion. " FOR EVERY PROBLEM YOU MUST DRAW A PICUTRE"

*asked by Emma on February 20, 2014* -
## Chemistry

How much ethylalcohol must be added to 1litre of water so that the solution will freeze at 14 farenite, kf of wa ter is 1.86 c/mol

*asked by Ria on February 22, 2017* -
## chemistry

Name the product obtained on passing carbon iv oxide into saturated sodium trioxocarbonate (iv) solution

*asked by Tobasco on May 21, 2016* -
## math

write an inequality that represnts this sentence, graph the solution. A hamster weighs less than 10 ounces. thanks

*asked by dillon on October 23, 2007* -
## precalculus

solve the inequality algebraically. write the solution in interval notation. the absolute value of x-2/3 is less than or equal to 4

*asked by jase on November 25, 2011* -
## science

a solution that is composed of 5g of salt for every 95g of water produces by what percent concentration of mass?

*asked by frances on September 26, 2012* -
## Chemistry

find the concentration of h3o in a .86mol/l solution of the weak acid H2O2 (kA=2.4x10-12)

*asked by Buck on May 31, 2016* -
## chemistry

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

*asked by Anonymous on June 29, 2013* -
## chemistry

What volume of a 0.553 M calcium hydroxide solution is needed to exactly neutralize 7.34 grams of KHP

*asked by Pam on April 9, 2015* -
## Algebra 2

The only solution of the equation ... x&2+bx-18 over (divided by) -2x+4 equals 4.... When x=-17. I plugged in the number and replaced x with -17 and it looks like this... (-17)^2 +(-17x)-18 over 38. I just got lost.

*asked by Macin on June 2, 2015* -
## general chemistry 2

How many grams of urea [CO(NH2)2] would be required to prepare 200 mL of a 5.0 x 10-3 molar solution? Answer

*asked by Anonymous on September 26, 2012* -
## C

number of moles of NaOH required to titrate 38.05mL of a 1.500 M H3PO4 solution

*asked by Nick on October 11, 2011* -
## Chemistry

Which of the following will be more soluble in an acidic solution than in pure water? Be(OH)2 Ag2SO4 RbClO4 CuCN Cul

*asked by Anon on March 14, 2013* -
## Science

What kind of a solution will you create if you add 17g of table salt to 50g of wAter at o'c?

*asked by John mark Lomboy on June 25, 2016* -
## Chemistry

Determine the concentration for the following solutions 2.0g KOH is dissolved in water to make 200.0 ml of solution

*asked by Sara on February 23, 2017* -
## math

Show you solution. List the terms that complete a possible pattern in each of the following: a)38,33,28,23,18,_,_,_ b)640,320,160,80,_,_,_ c)7,8,15,23,38,_,_,_

*asked by Anonymous on September 24, 2010* -
## Chemistry

Express the concentration of a commercial hydrogen peroxide solution, which is 3.0 (w/w), as a molarity. Show all work

*asked by Amber on March 13, 2014* -
## Chemistry (again)

What mass of NaOH is required to precipitate all the Fe2+ ions from 52.0 mL of 0.200 M Fe(NO3)2 solution?

*asked by Alex on September 28, 2010* -
## Chemistry

The Ksp of aluminum hydroxide is 5 x 10 -33.At what ph foes Al(OH)3 just begin to precipitate in a 0.15M solution of AlCl3?

*asked by Beth on October 7, 2010* -
## Chemistry

At home, you dissolve 26.0 g of AlCl3 in 1.5 kg of water. What is the freezing point of this solution? (Normal f.p = 0.0 C, Kf= 1.86 C kg/mol)

*asked by Nick on May 4, 2015* -
## chemistry

How many kilograms of water must be added to 75.5 grams of Calcium nitrate to form a 0.500 m solution?

*asked by lynda smith on November 18, 2009* -
## Analytical Chemistry

Determine the pH of a solution that is generated when 2.623 g Na3PO4 is added to a 100mL of 0.0800 M H3PO4.

*asked by Kevin on July 24, 2013* -
## chemistry

how many grams of Na2CO3 must be dissolved into 155 g of water to create a solution with the molality of 8.20 mol/kg?

*asked by william on December 6, 2010* -
## science

which solution is made entirely of gases? cough syrup,soda,helium,or clean air.

*asked by tricia on September 29, 2011* -
## algebra

use method of substitution to solve the system of linear equations. 2x-y=3 9x-4y=14 is the solution an ordered pair(,)

*asked by scott on March 30, 2012* -
## graphing linear equatios

I am really confused...can someone help me with this? I am supposed to graph solution of given system of linear inequality: y is greater than 4x-3 y is less than or equal to x+2

*asked by Lynne on November 20, 2010* -
## Math

Find the following indefinite integral ∫ (x^2 -8)/ (x^2 -16) dx My work ∫ (x^2 - 8) * ∫ (1/(x^2 - 16) ∫ (x^2 - 8) = [(x^3)/(3) - 8x)] + C ∫ (1/(x^2 - 16) = ∫ [(-1/8)/(x+4)] + [(1/8)/(x-4)] = (-1/8)*ln|(x+4)| +(1/8)*|(x-4)| + C So I get this,

*asked by Georges on April 21, 2019* -
## Metis of the Red River

About the Conflict that occurred between the Selkirk settlers and the Metis, could there have been any way to prevent it? Like could a peaceful solution have been found?

*asked by Anonymous on April 28, 2011* -
## Algebra

Find the missing coordinate to complate the ordered-pair solution to the given linear equation. 9y+7x=-63 (a) (-9,0) (b) (? ,7)

*asked by 1234 on March 6, 2013* -
## Chemistry

30.0 mL 0.200 M lithium hydroxide is added to 50 mL of 0.1 M nitrous acid. What is the final pH of the resulting solution?

*asked by YT on May 17, 2017* -
## analytical chemistry

What is the pH of a solution formed by mixing 14.35 mL of 0.200 F HCl with 0.322 g of Na3PO4, followed by dilution to 500.00 mL?

*asked by Jonny on December 4, 2007* -
## physics

damon,reiny,steve,ms sue.plz get a solution 2 my question please itz urgent!!!

*asked by edward on August 8, 2015* -
## chemistry

How many grams of sucrose would you dissolve in water for a total volume of 500mL to make a 5% solution?

*asked by jami on January 20, 2010* -
## algebra

I just started learning functions and how to graph them.. but I don't know how to do this problem? x + y = 0. I wasn't sure so I put "No Solution"

*asked by Michelle on December 2, 2010* -
## chemistry

If tums is added to 20.0 mL of 0.400 M HCl solution, how many grams of CO2 gas are produced?

*asked by Starlit on April 22, 2011* -
## Chemistry

The mass of lead bromide that is dissolved in 250 mL of a saturated solution is____ grams.

*asked by Kat on May 27, 2016* -
## Chemistry

Balance the net ionic equation I− + NO− 2 ! NO + I2 (in acidic solution). What is the sum of the coefficients? Use H+ rather than H3O+ where appropriate. 1. 13 2. 15 3. 17 4. 11 5. 19

*asked by Jeremy on October 20, 2010* -
## Maths, physics, chemistry,

The weight of H2C2O4.2H2O required to prepare 500 ml of 0.2N solution is a)126g b)12.6g c)63g d)6.3g

*asked by Deepak on April 29, 2017* -
## Chemistry

how many moles of solid mg(oh)2 should you ad to 200 ml of .15M acetic acid solution to produce ph 4.0 buffer?

*asked by Munavvar on February 28, 2015* -
## computer science

What type of solution is formed when steam from boiling water evaporates into the air?Explain.

*asked by Amar Saleh on October 12, 2010* -
## CHEMISTRY

GIVEN A 30G OF ALCL3 DISSOLVED IN 250G OF WATER TO CME UP WITH 400ML SOLUTION WHAT IS THE NORMALITY ?

*asked by Savannah on July 31, 2017* -
## Chemistry

What are the concentrations of acetic acid (pKa = 4.76) and acetate in a buffer solution of 0.15 M at pH 4.5? Please help me do this problem. I have no idea how to do it.

*asked by Emma on April 27, 2016* -
## Chemistry

How much Pb(OH)2(in mg) can be added to 4.0liter of a 0.095 M KOH solution before precipitation starts? Ksp 4.2x10^-5

*asked by Joy on April 1, 2013* -
## chemistry

What volume of water should be added to 50 ml of HNO3 having specific gravity 1.5g ml-1 and 63.0%by weight to have one molar solution

*asked by adarsh on June 13, 2015* -
## Chemistry

What will the pH of a solution be when 0.5447 L of NaOH (pH = 14.436) is added to 0.357 L of 2.01 M ascorbic acid (H2C6H6O6)? Not sure how to do this.

*asked by Anonymous on June 29, 2016* -
## chemistry

When a good indicator has been chosen, the pH at which the solution changes color is very close to the__________ point of the titration

*asked by Mia on April 4, 2008* -
## Chemistry

Name the product obtained on passing cabon(2) oxide into saturated potassium trioxocarbonate(4) solution.

*asked by Yaseerah on May 20, 2015* -
## chemistry

What is the molality of a solution made by adding 0.130 g of zinc sulfite to 151 ml water?

*asked by Dorothy on March 1, 2014* -
## AP chemistry

1). In a titration 20 mL of 0.100 M of HCl is added to 50.0 mL of 0.150 M of ammonia. A). What is the pH of NH3? B). What is the pH of the resulting solution? HELP :(

*asked by Amanda on March 21, 2013* -
## math

If 4 7 47 of 35 35 is divided by 2 9 29 of 21 21 , what is the quotient? Write the solution as a mixed number or a fraction in lowest terms.

*asked by Anonymous on September 23, 2017* -
## chemistry

40 mL of 0.150 M ammonium hydroxide is added to 20 mL of 0.3 M perchloric acid. What is the final pH of the resulting solution?

*asked by Anonymous on May 17, 2017* -
## chemistry

30.0 mL 0.200 M lithium hydroxide is added to 50 mL of 0.1 M nitrous acid. What is the final pH of the resulting solution?

*asked by YT on May 17, 2017* -
## chemistry

What mass of NaOH is required to precipitate all the Fe2+ ions from 50.0 mL of 0.200 M Fe(NO3)2 solution?

*asked by jennifer on January 11, 2010* -
## math

If the solution to the linear programming problem exists, then it has to be at a corner point.it is true or false?

*asked by sateko on April 18, 2011* -
## it

Can someone please help me with this. I need some understanding on how to 4] Use IPO for analysis [4] Use Pseudo Code to show your design solution. I am not sure how to do this or how or what to do. Please help me better understand this. Please

*asked by Anonymous on May 16, 2008* -
## Chemistry

which salt solution would have the highest ph and why KI,KBr,KF,KCL or they all have the same ph. Im leaning towards KF since im pretty sure the other salts are neutral?

*asked by Sean on February 19, 2017* -
## i hate.."chemistry"

write the balanced half reaction for the conversion of HOBr(aq) to Br2(aq) in acidic solution

*asked by amethyst on May 11, 2008* -
## Chemistry

What is the OH^- concentraton of a solution that is 0.10M in Na2C2O4? I have a couple of these concentration questions asking different things but I don't know how to do them

*asked by LT on April 14, 2008* -
## Math

After deducting10% from sum and then 20% from the remainder₹3600 are left.Find original amount.Solution

*asked by Prateek on June 8, 2017* -
## algebra

Find the radius and the center of the circular section of the sphere |r| = 17 cut off by the plane rÂ·(i+2j+2k) = 24. Solution

*asked by shamma on October 4, 2017* -
## Chemistry

a solution of 25 ml of HCL is neutralized by 42.5 ml of 0.10 M concentration of NaOH.Need to write a balanced equation for the reaction

*asked by Noah on March 10, 2015* -
## chemistry

the molarity of a solution composed of 25.4g KHCO3 diluted with water to a total volume of 200 mL

*asked by Colin on October 18, 2011*

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