# 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-
## Chemistry Please help

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* -
## 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

*asked by aditya on July 4, 2011* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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

*asked by aditya on July 4, 2011* -
## trig

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

*asked by Leigh on March 12, 2012* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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

*asked by aditya on July 4, 2011* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## Chemistry

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

*asked by Jade on April 6, 2016* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 7th grade math

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* -
## 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* -
## 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.

*asked by Please Help on April 5, 2016* -
## Chemistry

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

*asked by Gweedo on June 9, 2009* -
## 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* -
## 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* -
## chemistry

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

*asked by Adindu on May 18, 2014* -
## 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* -
## 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* -
## Science. Please Help!

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* -
## 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* -
## 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* -
## 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* -
## chemistry

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

*asked by nat on July 14, 2011* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## math

22_

*asked by janay1978 on June 9, 2009* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 5th grade

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

*asked by Anonymous on November 10, 2010* -
## 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* -
## 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* -
## science

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

*asked by Jon on October 7, 2010* -
## 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*

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