# 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 184

A bottle of 12.0 M hydrochloric acid has only 35.7 mL left in it. What will the HCl concentration be if the solution is diluted to 250.0 mL?

asked by Alexandra on September 29, 2013
2. ## science

the volume of nh3 at stp needed to pass into 30 ml of in h2so4 solution to bring down its strength to m/10

3. ## Math Help

2x^4-3x^2-7x+1=0 Estimate what the real solution will be using Newton's method. Answers must be 4 decimal places. Let the first guess be x=1.75

asked by Rachel on January 19, 2016
4. ## chemistry

What is the freezing point of a solution that contains 10.0 g of glucose (C6H12O6)in 100.g of H20? Kf for water is 1.86C/m.

asked by Lisa on February 15, 2010
5. ## Chemistry

How many mL of concentrated HCl would be required to make 200mL of a 4M solution? Specific gravity = 1.2, assay = 40%

asked by Yue on May 13, 2014
6. ## algebra 1

Solve the following systems of linear equations using any algebraic method.If possible,check your solution. 1)2x+5y=3 X-3y=7 2) 3y=11-2x 3x=y-11 3)8x-6y=14 12x-9y=18

asked by Janet on October 30, 2012
7. ## Chemistry

What is the freezing point of a solution that contains 10.0 g of glucose (C6H12O6) in 100 g of H2O? Kf for water is 1.86oC/m

asked by Sam on July 17, 2012
8. ## science

the volume of nh3 at stp needed to pass into 30 ml of in h2so4 solution to bring down its strength to m/10

9. ## trig

SOlve over (2,pie) and find the general solution in radians. 2sin3x = square root of 2

asked by Leigh on March 12, 2012
10. ## Science

Cost is an example of _____ in designing a product. A. a constraint B. a solution C. a trade-off D. an idea is the answer A?

asked by Anonymous on October 29, 2016
11. ## math help

2x^4-3x^2-7x+1=0 Estimate what the real solution will be using Newton's method. Answers must be 4 decimal places. Let the first guess be x=1.75

asked by Rachel on January 19, 2016
12. ## Algebra 2

Solve each polynomial equation. If a solution occurs more than once, state it's multiplicity. 4x^4-13^2+9=0 Please show work I need help

asked by Alicia on December 11, 2014
13. ## chemistry

Which of the following will be more soluble in an acidic solution than in pure water? AgBr Be(OH)2 RbClO4 CaCO3 PbSO4

asked by Katie on February 13, 2012
14. ## CHEM redox equations help!

MnO4 ^- + C2O2 ^2- = MnO2 + CO3 ^2- how would you balance this in basic solution? I keep getting the wrong answer.

asked by lily on October 22, 2015
15. ## biology

How much NaC3H5O3 (in grams) is needed to create a 1000 ml volume of Ringer’s lactate solution?

asked by Jeff on September 8, 2011
16. ## chemistry

How much NaC3H5O3 (in grams) is needed to create a 1000 ml volume of Ringer’s lactate solution?

asked by Jeff on September 8, 2011
17. ## Chemistry

Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

asked by Kevin on November 18, 2012
18. ## Biology

How much NaC3H5O3 (in grams) is needed to create a 1000 ml volume of Ringer’s lactate solution

asked by Nicole on September 9, 2011
19. ## chemistry

A What mass of KCl is needed to precipitate the silver ions from 26.0 mL of 0.100 M AgNO3 solution?

asked by karen on February 29, 2012
20. ## science

the volume of nh3 at stp needed to pass into 30 ml of 1N h2so4 solution to bring down its strength to m/10

21. ## chem

If 20 g KCL is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?

asked by tom on May 28, 2009
22. ## Chemistry

1. Outline a procedure to prepare an ammonia/ammonium buffer solution. I'm confused how to start it off.

asked by Emily on May 25, 2018
23. ## math

Find the area of a square if 1 side measures 22 cm. Include correct units with solution.

asked by jenna on July 3, 2011
24. ## chemistry

What would be the freezing and boiling points of a solution of 5.00g of sodium chloride dissolved in 25.0g of water?

asked by Jaques on May 9, 2014
25. ## Quick Math

Solve the following equation 5(z-4)-z=4z-20 4 -4 Infinitely many solutions No solution I had found that the answer was 0=0, but what does that mean? I’m confused. Thank you in advance.

asked by Anonymous on September 20, 2018
26. ## Chemistry

When 5.4 g of NaCl and 3.6 g of AgNO3 are dissolved in water and mixed, what ions remain in the solution and how many moles of each will be there?

asked by Valeria on October 23, 2014
27. ## Math (Alg 2)

The following expression represents the value of which variable in the solution of the system of equations below? |2 -1 1| |1 2 6| |3 -1 2| ___________ |2 -1 -2| |1 2 3| |3 -1 -1| 2X-Y+Z=-2 X+2Y+6Z=3 3X-Y+2Z=-1 A. Z B. Y C. X D. NONE OF THE VARIABLES ARE

asked by True on July 22, 2012
28. ## chemistry help

what mass of ammonium chloride can be added to 100g of water at 20 degrees C before the solution becomes saturated

asked by kate on May 28, 2009
29. ## Algebra 1

Choose the correct solution in roster form. N is the set of natural numbers that are factors of 12. {1, 2, 3, 4, 6} {1, 2, 3, 4, 6, 12}** {1, 2, 3, 4, 5, 6, 8, 12} {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}

asked by Anonymous on October 26, 2016
30. ## AP CHEMISTRY

What would be the pH of a solution prepared by combining equal quantities of NaH2PO4 and Na2HPO4? Explain with an equation.

asked by ERAGON on February 15, 2012
31. ## Chemistry

If 0.370 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

asked by Caitlin on December 3, 2017
32. ## chemistry

Topic: Iodometry 1. the reason why the Cu2+ solution has to be titrated immediately after addition of KI Answered above.

asked by smiley on July 29, 2007
33. ## Chemistry

Write the dissociation equation for calcium chloride. Include a diagram of the resulting solution.

34. ## Calc

Find the particular solution that satisfies the differential equation and the initial condition. f '(s) = 10s − 4s3, f(3) = 7 & f ''(x) = 6, f '(2) = 14, f(2) = 19

asked by Emily on October 26, 2016
35. ## math

how many cubic cm can a cigar box hold if its dimensions are 4 cm. by 14 cm. by 12 cm? include correct units with solution.

asked by jenna on July 3, 2011
36. ## Chemistry II

What is the molarity of a solution in which 13.7 g of calcium chloride is dissolved in water to a final volume of 750.0 mL?

asked by Michelle on September 1, 2009
37. ## chemistry

If 20 g KCL is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?

asked by kate on May 29, 2009
38. ## Chemistry

20cm3 of 0.1m sulphuric acid was required to react with 50.0cm3 of a solution of sodium hydroxide

asked by Aliyah on October 26, 2016

find a solution method use backtracking to solve equation; 54=6 (4-7V) _______ 2 7b+1 =2 __________ 4 8(56+12 -1) =64 _____3______

asked by holiday on March 29, 2011
40. ## Chemistry

Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

asked by Kervin on November 18, 2012
41. ## Math

Determine which ordered pair is not a solution of y= -4 , x -9 (-9,27) (3,-21) (5,-28) This is graphing coordinates. Please help I've been staring at this for 30 minutes so confused.

42. ## Chemistry

Describe how would you prepare .005M solution of IO3^-1 starting with potassium iodate KIO3

asked by Gweedo on June 9, 2009
43. ## chemistry

what mass of sodium acetate, NaCH3CO2, must be added to 1.0 L of 0.10 M acetic acid to give a solution with a pH of 4.50?

asked by kim on March 9, 2010
44. ## Chemistry

Determine the hydronium ion concentration in a solution that is 0.00039 M HCl. Answer in units of M.

asked by Kiara on May 12, 2018
45. ## chemistry

Describe a suitable procedure for preparing a saturated solution of trioxonitrate(v) at 30 degree celsius?

46. ## chemistry

What is the boiling point of a solution composed of 15.0g urea, (NH2)2CO, in .500kg of water?

asked by Evelyn on January 19, 2011
47. ## Chemistry

What is the mass of a solution that has a volume of 0.100L and a density of 1.07g/ml. Find in grams and In kilograms.

asked by Deb on February 12, 2012

If you add 4 grams of KCl to 10g of water at 28 C, would the solution be saturated, unsaturated or supersaturated?

asked by Anonymous on February 14, 2011
49. ## math

Solve using the addition and multiplication principles. 6minus−6x less than or equals¡Ü 4minus−5x what is the solution set

asked by art institute on March 11, 2016
50. ## Calculus

Find the particular solution that satisfies the differential equation and the initial conditions. F'(x) = 4x^2 f (-1)=3 F'(t)=10t-12t^3 f (3)=2

asked by Anonymous on November 2, 2016
51. ## Chemistry instruments

what is that tool called the one you put drops of solution in to observe if a ppt is formed?? dish...something??

asked by Giznelbell on October 19, 2008
52. ## chemistry

phenol is insoluble in NNAHCO3 solution while acetic acid is soluble.give reason.

asked by nat on July 14, 2011
53. ## Chemistry

How many grams of magnesium sulfate would you need to make 0.500 L of a 10.0% M/V solution in water? Please show work.

asked by Margaret on February 18, 2013
54. ## CHEM

How many grams of sodium chloride are required to prepare 1.00 liter of a 1.00M NaCl solution?

asked by Lisa on February 7, 2013
55. ## Chemistry

What is the molarity of a potassium chloride solution that has a volumeof 400.0 mL and contains 85.0 g KCl? Please show work.

asked by MEGAN!!!! on April 30, 2010
56. ## chemistry

TO HAC SOLUTION (02M 100ml) we add NaOH (0.12M 80ml) what is the ph (answer: 4.71)

asked by ben on January 22, 2013
57. ## Chemistry

How could tell a copper (II)sulfate solution from lead (II)nitrate or sodium sulfite if the solutions were not labeled ?

asked by Jackson on February 13, 2011
58. ## Algebra

Find the missing coordinate to complete the ordered-pair solution to the given linear equation. 2x−3y=3 (a) (−3, ) (b) ( ,1)

asked by Dee365 on April 1, 2016
59. ## Differential Calculus

Given that p=(2q^2-5)^2. when q=3, it is increased by 0.7%. find the appropriate percentage in p. solution dp = 2(2q^2-5) (2dq) dp = (4x(18-5)(0.7%) dp = 4(13)(0.7%) am lost from here is dp=52x0.7/100= 0.364%

asked by matrix school 2 on August 14, 2009
60. ## algebra

Write the equation for the following relation. Include all of your work in your final answer. Submit your solution. P = {(x, y): (1, 0), (2, 4), (3, 8), (4, 12),

asked by Anonymous on September 5, 2014
61. ## algebra

solve the equation if it an identity(all real numbers) or a contradiction(no solution) so state 5x+6+6x=10x+6+y

asked by babygirl on September 5, 2011
62. ## algebra

Show a complete algebraic solution for the following: find 4 consecutive multiples of 11 with the sum of 2178

asked by Anna on February 17, 2010
63. ## Chemistry

23.7 grams of glucose(C6H12O6) are added to water to give a 246 ml of solution. what is the Molarity

asked by Jackie on May 31, 2011
64. ## chemistry

The Henry's law constant for CO2 is 3.1 x 10-2 mol/L-atm at 25°C. What pressure would be necessary in order to have a .25 M solution?

asked by S on February 5, 2015
65. ## Chemistry

Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

asked by Kervin on November 18, 2012
66. ## Calculus

Find the particular solution that satisfies the differential equation and the initial conditions. f''(x) = x^2 f'(0) = 8, f(o)=4 f'(t) 10t - 12t^3, f(3) =2

asked by Emily on November 1, 2016
67. ## Gen Chem 2

How many equivalence points would be visible for a solution of 1.0M sulfurous acid titration. Is it just two because in H2SO3 there are two H+ ions?

asked by Kyle on October 29, 2013
68. ## Math

Determine which ordered pair is not a solution of y= -5x - 4. (10,-52) (7,-39) (-7,3) (8,-44) I think it is (10,-52) Pls help I always mix up graphing coordinate planes!

asked by 7 dream kid on November 19, 2018
69. ## Math

Use the Law of Sines to solve triangle ABC when a=1.43,b=4.21,and A=30.4 degrees. If no solution exists, rite none.

asked by Sally on June 9, 2009
70. ## Bio

How much NaC3H5O3 (in grams) is needed to create a 1000 ml volume of Ringer’s lactate solution?

asked by Joe on September 6, 2011
71. ## Chemistry

Consider 57.5 mL of a solution of weak acid HA (Ka = 1.00 10-6), which has a pH of 3.800. What volume of water must be added to make the pH = 6.000?

asked by Brian on February 15, 2009
72. ## pre algebra

solve the following system graphically. Check your solution. 3x+y=9 -2y=x-8 I know im supposed to put it in y=mx+b form but i don't know how to.

asked by Kim on June 9, 2009
73. ## Chemistry

Express the concentration of a 2.0 M NaOH solution as a mass/volume percent. Can you please explain how to get the answer?

asked by Ashleigh on May 29, 2012
74. ## math

22_

asked by janay1978 on June 9, 2009
75. ## Algebra II-Please check my solution

Solve by elimination method-thanks fro checking my work 2x + 3y= 2 multiply this equation by 2= 4x + 6y = 4 4x-2y = -28 4x + 6y = 4 -4x -2y = -28 8y = 32 y = 4 2x + 3(4) = 2 2x + 12 = 2 2x + 2-12 2x = -10 x = -5 solution = (-5,4)

asked by Joella on February 16, 2011
76. ## math

What is the area of the region bounded by the x-axis and the lines x+y=24 and 3x-2y=12? Please show full solution and explanation

asked by K on December 19, 2017
77. ## algebra

solve the equation and state if it an identity ( all real numbers) or a contradiction(no solution) 5x+6+6x=10x+6+y

asked by babygirl on September 5, 2011
78. ## math

solve using the elimination method. If the system has no solution or infinite number of solutions a state this 4x-6y=30 3x-5y=24

asked by nicholas on February 16, 2011
79. ## Algerbra

Find the missing coordinate to complete the​ ordered-pair solution to the given linear equation y+4x=3 (-1,) (5,)

asked by lesca on January 10, 2016
80. ## Calculus - Differential Equations

Use separation of variables to find the solution to the differential equation: 4 (du/dt) = u^2, subject to the initial condition u(0)=6.

asked by James on November 4, 2016
81. ## pre - CALCULUS

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. x + y + z = 9 2x - 3y + 4z = 7 x - 4y + 3z = -2 A. {(-7z/5+34/5 ,2z/5 +11/5 , z)} b. {(- 7z/5+34/5 , 2z/5- 11/5 , z)} c . {( z/5+ 34/5 , 2z/5+11/5

asked by Ciara on April 11, 2015
82. ## chemistry

how ,amy grams of aspirin are required to react exactly with 29.40ml of a 0.6M solution of sodium hydroxide

asked by ujay on January 17, 2010
83. ## chemistry

if I have 1.60g of urea, how much water, in grams, should be added in the preparation of a 23.1 percent by mass solution?

asked by Anonymous on March 13, 2014
84. ## chemistry

If 25 g of NH4Cl is dissolved at 80C, how many additional grams would be needed to make the solution saturated?

asked by Veronica on February 14, 2017
85. ## science

If the soluton of ammonium chloride is heated to 75 degrees celcius, is the solution now sturated or un saturated?

asked by shay on May 5, 2011
86. ## 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
87. ## Chemistry

What ratio of molar concentrations of sodium acetate to acetic acid can buffer a solution at a pH of 4.89?

asked by Samantha on March 27, 2017
88. ## chem

What volume of 0.250 M H2SO4 is required to titrate a solution containing 0.200 g of KOH to its endpoint?

asked by bob on January 11, 2013
89. ## mathematics

find the general solution to the following differential equation dy/dx=-(In(x))/(x^2)*y^1/2 (x>0,(y>0)give answer in implicit form.

asked by queros on May 29, 2008
90. ## Chemistry

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

asked by Tyler on October 12, 2011
91. ## chemistry

What is the concentration, mass/vol percent (m/v) of a solution prepared from 50.gNaCl and 2.5L? Do I divide 50.g NaCl/2.5L?? = 20% Thank you!

asked by Connie on October 14, 2011
92. ## Chem

How many grams of Ni would be electroplated if a constant current of 7.2 amperes is passed through a solution of NiSO4 for 90.0 min?

asked by George on March 19, 2013
93. ## Chemistry

How many total mL of 1 M NaOH can you add to the solution in problem 1 and still have a good buffer (that is, within 1 pH unit of the pka)?

asked by Irving on September 5, 2017
94. ## Chemistry

500 mL of water is added to 25 mL of 6.0 M hydrochloric acid. What is the final concentration of this solution in mol/L?

asked by Ashley on October 5, 2009
95. ## Chemistry

What must be the concentration of F- to just start precipitation of SrF2 from a solution which is 1.202*10-5M i Sr(NO3)2? Ksp = 2.900*10-9

asked by Jude on April 17, 2011

Explain the type of solution formed when steam from boiling water evaporates into the air

asked by Anonymous on November 10, 2010
97. ## Math

Show all work solve the Polynomial inequality and express the solution in set notation. y^2+2y > or = to 4

asked by Anonymous on October 18, 2011
98. ## math

Find the general solution using the method of undetermined coefficients. y''' - 10y'' + 25y' = e^(-x) cos x + e^(5x) + x.

asked by Shane on May 8, 2011
99. ## science

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

asked by Jon on October 7, 2010
100. ## Chemistry

What is the PH of a 0.747M sodium cyanide solution (NaCN) knowing that the Ka of Hydrocyanic acid is 4.9x10-10?

asked by Ab on March 23, 2019