# 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 231
1. ## chemistry

What is the percent by mass concentration of KCl in a solution prepared by adding 80.0 g KCl to 200.0 g of water?

asked by Pressila on September 27, 2010
2. ## Chemistry 12

In s 0.30 mol/L HNO3(aq) solution. a) what is the concentration of nitric acid molecules. b)what is the hydroxide ion concentration?

asked by JM on April 1, 2011
3. ## Chemistry 30

How do I complete an ICE table for a solution of nitrous acid, HNO2, one of the acids associated with acid deposition?

asked by Iris on December 31, 2012
4. ## Chemistry

Why is it important to keep the NaOH solution (being used during titration) stoppered at all times when it is not in use? And why is it all right to use a wet flask for a titration experiment?

asked by Cassie on March 26, 2011
5. ## Chem

What is the pH of a 0.115 mol/L solution of sodium acetate, CH3COONa, at 25oC? (pKa=4.74 at 25oC for CH3COOH.)

asked by M on April 3, 2016
6. ## chemistry

What mass of MgSO4 · 7H2O is required to prepare 300 mL of a 0.61 M MgSO4 solution? Answer in units of g

asked by cheri on September 16, 2012
7. ## chem

If a solution initially contains (9.5x10^-2) M of HC2H3O2, (and no H3O+ or C2H3O2– ),what is the equilibrium concentration of H3O+ (aq) in the mixture?

asked by mike on May 1, 2016
8. ## Chemistry

Why wouldn't HCl be a good acid to use to determine the solubility of a silver precipitate in acid solution?

asked by Nicole on April 12, 2011
9. ## Calculus

Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

asked by Mike on January 23, 2013
10. ## Chemistry

How many moles of benzoic acid, a monoprotic acid with Ka=6.4×10^-5, must dissolve in 250mL of H2O to produce a solution with pH=2.04

11. ## Calculus

Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

asked by Mike on January 23, 2013
12. ## chemistry

What would be the best technique to separate a soluble solid from a solution, like separating salt from a mixture of salt water?

asked by Ashley on April 17, 2011
13. ## Chemistry

For the reaction: Pb(NO3)2(aq) + 2KCl(aq)->PbCl2(s) + 2KNO3(aq) How many grams of PbCl2 will be formed from 63.0 mL of a 1.60 M KCl solution?

asked by Terri on June 22, 2016

if you have a mixture of sodium chloride and sodium bromide, could you use its conductance to determine the concentration of each solution? explain

asked by Anonymous on January 9, 2013
15. ## science

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

asked by Anonymous on October 15, 2009
16. ## Calculus

Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

asked by Mike on January 24, 2013
17. ## Math

The equation x^2+12x=73 has two solutions. The positive solution has the form (sqrta)-(b) for positive natural numbers a and b. What is a+b? Thanks

asked by Linda on April 7, 2016
18. ## chemistry

a supersatured sugar solution (can/ cannot) be used in a calibration graph. What kind of graph, but probably not since you won't know the degree of supersaturation.

asked by hawkstar on October 4, 2006
19. ## Chemistry

If 45.8 grams of MgO are dissolved in 205 grams of water, what is the concentration of the solution in percent by mass?

asked by ilyrae on March 21, 2011
20. ## Analytical Chemistry

how much volume of h2so4 is needed to produce a 0.953 Normality) of h2so4 if the 1 liter solution is 1.14 g/mL in density?

asked by Sham on August 13, 2016
21. ## chemistry

What mass of NaCl should be found in 0.51 L of a saturated solution of sodium chloride if the Ksp of NaCl is assumed to be 1.5 x 10-5?

asked by Johnathan on May 25, 2008
22. ## math

integral of ((1+sin(2x))^0.5)/(sin(x)^2) I tried all kind of substitution, simplification but unable to solve it.Need a hint only no solution please.

asked by Sam on April 15, 2017
23. ## Chemistry

How many milliliters of 1.40 M KOH solution are needed to provide 0.120 mol of KOH? please explain how to solve

asked by Veronica on October 7, 2010
24. ## Finance

what is the solution to bunyan lumber lumber 45-year harvest based on \$300,000 contribution

asked by sharon on December 19, 2011
25. ## chemistry

Explain in words how you would prepare 250 ml of a 3.000 M solution of Ba(OH)2 starting from a two liter bottle of 12.000 M Ba(OH)2

asked by lalo on October 11, 2010
26. ## chemistry

Describe how you would make 500.0mL of a 0.200M NaOH solution from a 15.0 stock NaOH conentration

asked by Monique on November 6, 2011
27. ## chemistry

A solution of 25.0mL of 0.10mol/L hydroiodic acid is titrated with 0.10mol/L ammonia.Determine the pH at equivalence.

asked by rana on January 29, 2017
28. ## Chem

The molecular weight of CaCl2 is 110.98 g/mol. In order to make up 500.0 ml of a 0.500 M solution, you need how many g?

asked by Danny on July 26, 2012
29. ## Chemistyr

Eighty grams of sodium nitrate dissolved in 50 grams of water will make what type of solution?

asked by Kayla Johnson on March 28, 2012
30. ## chem

What is the pH of a solution prepared by diluting 25.00mL of 0.020M barium hydroxide to a volume of 100.00mL?

asked by Ginger on April 26, 2008
31. ## health science chemistry

How many ml of water should be added to 20.0 ml of a stock of 12.0 M HCl solution to make 1.50 M HCl ?assume that the volumes are additive.

asked by konja on May 4, 2016
32. ## science

what is the concentration of a sugar solution that contains 8 g sugar dissolved in 500 ml of water? explain in ration form

asked by cheryl on November 20, 2011
33. ## Chemistry

2 Ag+(aq) + Fe(s) --> 2 Ag(s) + Fe2+(aq) Which electrode is the anode, and which is the cathode. and In which directions do the cations and anions migrate through the solution? cations thanks

asked by Rachel on May 10, 2011
34. ## chemistry

What is the concentration (in molarity) of acetone in a solution prepared by mixing 11 mL of 4.0 M acetone, 16 mL of 0.02 M Br2, 11 mL of 1.0 M HCl, and 16 mL of water?

asked by elizabeth on September 16, 2010
35. ## Chemistry

What are the concentrations of HSO4- and SO42- for a 0.0050 M sulfuric acid solution? We are trying to find x but not sure how to find it on the calculator, please help!!!

asked by Haley&Emily on February 21, 2014
36. ## Chemistry

If you weigh out 2.083 g Fe(NO3)3·9H2O, what is the final concentration of the dilute Fe(NO3)3 solution that you make?

asked by Sarah on June 27, 2013
37. ## Chemistry

Suppose that you used 0.75g of iron. What is the minimum volume of 1.5 M_ CuSO4 solution required Using eqn. (3-1)? and eqn. (3-2)?

asked by Liza on September 12, 2015
38. ## chemistry

give the pH of a solution containing .972 g HBr in 628 mL of a soluion. I did .972/80.9=.012 mol. what do i do next...i'm stuck!

asked by Miley on May 15, 2008
39. ## chem

what test will you perform to determine when you have added sufficient NaOH solution to the reaction mixture in reaction 2

asked by erlicia on September 29, 2010
40. ## Algebra

i tried to figure out if 5/3 would be a solution for 6x^2-11x-35=0. i got -0.21 on the left side. is this close enough to 0 that it would count because my book said it was indeed equal to the right side.

asked by Aliviah on September 27, 2009
41. ## chemistry

A 116.9 g sample of nitric acid solution that is 70.0% HNO3 (by mass) contains how many moles of HNO3? how did you get the answer

asked by DIANA on December 5, 2011
42. ## chemistry

How many grams of chlorine gas are needed to make 5.10 × 106 g of a solution that is 1.50 ppm chlorine by mass?

asked by Anonymous on September 24, 2014
43. ## Chemistry

A current of 3.94 A is pass through a Pb(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 5.40 g of lead?

asked by Brianna on July 24, 2013
44. ## Math

I need help on how to solve this type of problem please. 29.)Solve the inequality and express the solution in terms of intervals whenever possible. 1/(x-2) ≥ 3/(x+1) THE ANSWER IS: ( -∞,-1 ) U ( 2,(7/2) ]

asked by Alex on August 12, 2012
45. ## chemistry

what volume of 0.150M Li2Sr solution is required to completely react with 130ml of 0.150M Co(NO3)2

asked by Jake on October 17, 2014
46. ## Chemistry

A current of 5.61 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 9.00 g of nickel?

asked by Anon on March 29, 2013
47. ## chemistry

What mass of MgSO4 · 7H2O is required to prepare 300 mL of a 0.61 M MgSO4 solution? Answer in units of g

asked by cheri on September 13, 2012
48. ## AP Chemistry

A solution is prepared by titrating a 100.0 mL sample of 0.10 M HF (Ka = 7.2 × 10-4) with 0.10 M NaOH. A)What is the pH after 20.0 mL of the 0.10 M NaOH is added? Show all calculations.

asked by Anonymous on March 25, 2016
49. ## Calculus

If g(X) = 2+ln(x-5), find the inverse function, (g^(-1))(x) Solution: y = 2+ ln(x-5) e^y = 2 + x - 5 x = e^y + 3 y = e^x + 3 g^(-1) = y = e^x + 3 Is that right? I'm following an example - but don't really get it - how do I determine the domain and range -

asked by Linda on September 3, 2016
50. ## Science!

Which of the following is not a process of a stream load? A. Suspension B. Bed Load C. Materials in solution D. Divide Im thinking D but also C?

asked by Morgan on September 8, 2014
51. ## science

ind the molality of the solution obtained when 36.5 gram HNO3 is dissoloved in 750 gram water

asked by tanay patel on September 23, 2014
52. ## Chemistry

Suppose you mix 20.1 g of water at 66.2°C with 45.1 g of water at 35.7°C in an insulated cup. What is the maximum temperature of the solution after mixing?

asked by Lance on June 7, 2011
53. ## math

what is the concentration of a sugar solution that contains 8g sugar dissolved in 500 ml water? answer in the form of a ratio

asked by cheryl on November 20, 2011
54. ## chemistry

indicate the concentration of each ion presentin the solution formed by mixing 20mL of .1M HCL and 10mL of .22 M HCL

asked by fdg on December 6, 2011
55. ## Chemistry

How many grams of Calcium Nitride can be produced using the calcium contained in 100 ml of a 4 Molar beryllium solution?

asked by momo on April 15, 2012

formulate a solution that takes into account audience characteristics... requirements, and expectations? the scenerio I have tell 25 classmate that our trip has been canceled for mexico because the bus company filed bankruptcy and they will not be getting

asked by todd on July 20, 2006
57. ## Physics

For a L-C-R circuit Vin = v0*expjwt. Vout is taken across R a) Calculate the impedance of the circuit measured from the input side. Express the impedance in polar form. b) Calculate the gain=Vout/Vin and express the ratio in polar form. c) Sketch the

asked by Sandhya on March 29, 2008
58. ## Physics

At a chemical plant where you are an engineer, a tank contains an unknown liquid. You must determine the liquids specific heat capacity. You put 0.500 kg of the liquid into an insulated metal cup of mass 0.200 kg. Initially the liquid and cup are at 20

asked by Marthin on January 17, 2018
59. ## Chemistry

how many cubic cm hydrogen chloride gas at s.t.p would be required to precipitate all the silver ions from 32 cm of 0.08 M silver nitric solution?

asked by Doris on September 23, 2016
60. ## chem

100 mL of LiNO3, 0.241 M is mixed with 240 mL of 0.618 M Ca(NO3)2. What is the final concentration of NO3- in the solution?

asked by duff on January 24, 2008
61. ## Chemistry

What is the mechanism of an aldehyde reacting with fehlings solution and tollens reagent? I know it is oxidised to a carboxylic acid, but i want to know the mechanism. Thank you.

asked by Alexandre A A on October 12, 2014
62. ## Mathematics

1. Determine which ordered pair is a solution of y = x^2-2 (5, 21), (–5, 24), (–1, –1), •• (–2, 6) 2. Without graphing, tell whether the line containing (6, –3) and (0, –8) is horizontal, vertical, or neither I think it's horizontal Correct

asked by Queen/Halle on April 10, 2016
63. ## chemistry

Explain how you would prepare the following dilute solutions from the more concentrated ones: a. 200ml of .500M HCL from a 6.00M HCL solution.

asked by cameron on April 4, 2011
64. ## Chemistry

A solution has a hydroxide-ion concentration of 7.48X10-5 M. What is it's hydronium-ion centration? I have no idea where to begin on this question...

asked by Robby on February 18, 2013
65. ## Chemistry

a 0.451 L solution of 1.71 ascorbic acid (ka1=7.9E-5, ka2=1.6E-12) is titrated with 1.35 M NaOH. What is pH when 0.9540 L of NaOH is added?

asked by Chris on December 11, 2012
66. ## science

Why is it difficult to distinguish between some pure substances and solutions? What methods can overcome this to define if either it is a pure substance or solution?

asked by Sunny on April 14, 2013
67. ## chemistry

What would be the pH of a 0.563 M solution of ammonia (NH3) at room temperature? The Kb of ammonia is 1.78 × 10−5. 1. 2.5 2. 7 3. 9 4. 4.5 5. 11.5 ( I did this problem but apparently 4.5 isnt the answer)

asked by vivian on May 13, 2011
68. ## Math

1. Determine which ordered pair is a solution of y = x^2-2 (5, 21), (–5, 24), (–1, –1), •• (–2, 6) 2. Without graphing, tell whether the line containing (6, –3) and (0, –8) is horizontal, vertical, or neither I think it's horizontal Correct

asked by Queen on April 10, 2016
69. ## Chemistry

What mass of lithium phosphate is needed to prepare 500.0 mL of a solution having a lithium ion concentration of 0.1385 M?

asked by Chris on April 14, 2014
70. ## Algebra

You work in a lab. One day you need 568 oz of a chemical solution consisting of three parts alcohol and five parts acid. How much of each should be used?

asked by Marinette on February 16, 2016
71. ## bio/chem

how do i make percent solutions w/v starting with pure NaCl and distill water. eg 100ml of a 1% NaCl solution

asked by Amber M on May 13, 2010
72. ## math

Solve the equation. (Enter solutions from smallest to largest. If there is no solution, enter NONE in the answer boxes.) 5x2 = 9x + 2

asked by Anonymous on January 22, 2012
73. ## chemistry

determine the concentration of NH3(aq) that is required to dissolve 775 mg of AgCl(s) in 100.0 mL of solution. The Ksp of AgCl is 1.77× 10–10.] please help!!!!!!!

asked by maggie on April 3, 2015
74. ## Chemistry

1. Show quantitatively how you would prepare a solution of 3.10 x 10^2 g of 0.125 molar (m) ethylene alcohol from ethylene glycol and water.

asked by eddy on August 3, 2011
75. ## Science

In an experiment, Tom dissolved 2.125 g of NaOH to make 200.0 mL of aqeous solution. What is the NaOH molarity?

asked by Anonymous on October 3, 2011
76. ## Chemistry

How many grams of barium nitrate is needed to form a solution with 5.00 mass% Ba (NO3)2 in 400 grams of water.

asked by Vicki on May 14, 2013

I have two questions That I need help with please!! 1. solve the following exponential equation. what is the exact solution? what is the decimal approximation when rounded three decimal places? 2.

asked by Sandi on January 9, 2013
78. ## Chemistry

Given an unknown mixture consisting of two or more substances, explain how we could determine whether that mixture is a true solution, a colloid, or a suspension

asked by Anonymous on March 11, 2010
79. ## Math

5. Find the solution to the system of equations by using either graphing or substitution. y = 6 – x and y = x – 2 (2, 4) (–4, 2) (4, 2) no solutions 6. y = 2x – 1 and y = x + 3 (1 point)(4, 7) (7, 4) (–7, –4) infinite solutions 7. y = 4x and y

asked by Mr.Brain on May 2, 2013
80. ## Environmental

I have to write a paper on an environmental problem and expand on a (or two) solution to the problem... any ideas? Anything specific would be great since I'm at a stand still...

asked by Jessy-Leigh on December 3, 2007
81. ## chemistry

A solid that has a high melting point and conducts electricity in solution is a(n) ______________ solid. Im not sure what the answer is it molecular?

asked by Cecilia on September 8, 2010
82. ## math

an equilateral triangle of side 10cm is inscribed in a circle. find the radius of the circle? show the solution

asked by shafa on March 7, 2019
83. ## chemistry

according to the data in the merck index,if 1,0g of aspirin is dissolved in 100ml of water at 37,how much aspirin will precipitate out of solution when it is cooled to 25.

asked by peter on March 18, 2017
84. ## algebra URGENT HELP

analyze the graph of the following function solve R(x)=x(x-16)^2 /(x+11) solve the following inequality write solution in interval notation x+14/x-8 less than or equal to 1

asked by zachary on March 11, 2013
85. ## Chemistry

If .0162 moles of sodium sulfide is dissolved in 100.0 mL of water, what is the concentration of sodium ions [Na⁺] in solution?

asked by div on May 2, 2016
86. ## chemistry

Find the mass of barium metal (in grams) that must react with O2 to produce enough barium oxide to prepare 1.1 L of a 0.10 M solution of OH^ -.

asked by Jessica on February 19, 2011
87. ## chemistry

A solution is prepared by dissolving 17.1grams of sucrose, c12h22o11, in 275grams of h20. a)what is the molar mass of sucrose? How would i do that??

asked by Miley on April 5, 2008
88. ## osu

a 50.0 ml sample of a 15% (m/v) solution of H2SO4 is added to water to give a final volume of 250.0 ml. What would the final concentration be?

asked by Kat on November 23, 2010
89. ## Chemistry

What is the Cl concentration just as Ag2CrO4 begins to precipitate when 1.0 M AgNO3 is slowly added to a solution containing 0.015 M Cl and 0.015 M CrO4^2?

asked by Jake on February 20, 2011
90. ## chem class

A 25.00-mL sample of 0.723 M HClO4 is titrated with a 0.273 M KOH solution. The H3O+ concentration after the addition of 10.0 mL of KOH is ???? M.

asked by richard on November 23, 2010
91. ## chemistry

What would be the pH of a 0.563 M solution of ammonia (NH3) at room temperature? The Kb of ammonia is 1.78 × 10−5. 1. 2.5 2. 7 3. 9 4. 4.5 5. 11.5 ( I did this problem but apparently 4.5 isnt the answer)

asked by vivian on May 13, 2011
92. ## Chemistry

If the solubility constant for Ag2CO3 is equal to 8.1x10^-12 how many grams of Ag2CO3 will dissolve in a .0001 M solution of Na2CO3?

asked by Jack on April 17, 2014
93. ## Chem

I did an experiment for creating an ester. So basically I added an acid to an alcohol. We were to also add H2SO4 solution. Why did we add that?

asked by Lena on March 25, 2009
94. ## chem

How many grams of CaCl2 (molar mass = 111.0 g/mol) are needed to prepare 4.44 L of 0.500 M CaCl2 solution?

asked by jann on May 15, 2011
95. ## Chemistry

In a 1.0× 10–4 M solution of HClO(aq), identify the relative molar amounts of these species. (most to least) H2O HClO H3O OH- OCl-

asked by Paula on March 9, 2013
96. ## Science

When water is mixed with another substance and the mixture will not scatter light, the mixture is a:? 1) suspension  2) compound  3) solution  4) substrate

asked by Jen on February 25, 2018
97. ## Chemistry

Find the mass of urea (CH4N2O) needed to prepare 50.9 g of a solution in water in which the mole fraction of urea is 7.69×10−2.

asked by Nicole on February 24, 2016
98. ## physical chemistry

How many grams of NaC2H3O2 (M = 82.034 g mol-1) should be dissolved in 400.0 g of water to prepare a solution which is 11.28 % NaC2H3O2 by mass?

asked by shafika on January 30, 2010
99. ## chemistry

How many grams of copper will be required to replace silver from 200 mL of 3.00M solution of silver nitrate AgNO3?

asked by randy ramos on March 30, 2011
100. ## Math

Got quite a silly question, but wondering if anyone knows the solution. Find the sum of the two missing numbers in the sequence 4, 3, 3, 2, 3, 3, 7, 7, 2, _,_ a)10 b)8 c)11 d)7 e)6 Cant seem to find the pattern here, can anyone see it?

asked by Alex on November 27, 2018