# 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 175-
## Chemistry

what is the percent by mass of a solution by dissolving 200 g of NaCI in 500 mL of water?

*asked by Annyssa on June 15, 2016* -
## bio

what will happen to a red blood cell place in a solution of 99.3% water and 0.7% salt?

*asked by alex on October 26, 2011* -
## College 103 Chem

How many grams of Sodium Phosphate would you need to make 225ml of 8.00M of stock solution? Thank you

*asked by Andrew on July 10, 2013* -
## Chemistry(Please help)

If you add 0.35grams NaF to 150mL of a 0.30M HF, what is the pH of the resulting solution? To start off would I use the value of 1.4e-11 for F^-^ and 7.2e-4 for HF?

*asked by Hannah on April 9, 2012* -
## chemistry

How do you sole this problem: how many grams of CaCl2 are needed to prepare 7.25 L of .015M solution?

*asked by Brittany jones on March 15, 2013* -
## chemistry

How many grams of na3po4 will be needed to produce 425ml of a solution that has a concentration of na+ ions of 1.30 M?

*asked by James on September 11, 2010* -
## Calculus

write and row reduce the augmented matrix to find the general solution: 2x - z = 2 6x + 5y + 3z = 7 2x - y = 4

*asked by Liz on January 26, 2014* -
## Calculus

write and row reduce the augmented matrix to find the general solution: x - 2y + 13 = 0 y - 4x = 17

*asked by Liz on January 26, 2014* -
## chemistry

How many moles of HNO3 are present if 0.236mol of Ba(OH)2 was needed to neutralize the acid solution?

*asked by Anon on August 6, 2012* -
## chemistry

How many grams of lithium nitrate, LiNO3, are required to prepare 3.00 × 102 mL of 2.00 × 10−1 M solution?

*asked by kathy on December 6, 2011* -
## chemistry

What formula do I use to figure how many mL of 6.00 M of HCl must be diluted to make 600 mL of a 0.500 M solution?

*asked by Norma on July 25, 2010* -
## Math

Find the solution and round to the hundredths. 24 divided by 0.865. I got two answers I'm confused.

*asked by Jessica on March 16, 2013* -
## chemistry

a solution is made by dissolving 117 g of nacl in 585 g of h2o. what is its molarity

*asked by hello on June 12, 2013* -
## Chemistry

OMG! HELP! 1. How many grams of CaCl2 would be required to produce a 3.5 M (molar) solution with a volume of 2.0 L?

*asked by Victoria on August 17, 2013* -
## chemistry

find the mole fraction of 10g/l aquous solution H2So4 having density 0.01 g/ml

*asked by Hariom on July 30, 2015* -
## science: chemistry

How many moles of NaOH must be added to 1.0 L of 2.6 M HC3H5O3 to produce a solution buffered at each pH? 1)pH= 4.28 2)pH=pKa

*asked by Julie on July 23, 2015* -
## math 9

Identify the solution(s) of the system of equations, if any. 3x-2y=6 5x=5-25y A) (28/13, 3/13) B) (-3/17, 32/17) C) (32/17, -3/17) D) (32/9, 7/3) I think the answer is D but i did my check and still comes out incorrect

*asked by sam on October 20, 2013* -
## chemistry

what is the vapour pressure in mm of Hg of nickel nitrate solution at 125 degree centigrade

*asked by Anonymous on February 16, 2012* -
## chemistry

Determine the volume of a 0.550M of kmno4 solution required to completely react with 2.70 of zn

*asked by ain on February 16, 2012* -
## New delhi

Find molarity of 20%aqous soluion of amino . the density of the solution is 1.4 grams/ml

*asked by Tk on July 21, 2015* -
## chemistry

If 2.0 mL of 0.80M copper (II) sulfate and 8.0 mL of water are mixed, what is the concentration of the resulting solution?

*asked by roger on March 1, 2012* -
## chemistry

if 1.00M solution of NaOH was diluted enough would it eventually become acidic? showing calculations

*asked by sarah on April 17, 2010* -
## Chemistry

The Ka values of H3PO4 are shown below. Ka1 7.5 10-3 Ka2 6.2 10-8 Ka3 4.8 10-13 What is the pH of a 0.19 M solution of NaH2PO4?

*asked by Chris on March 8, 2009* -
## Chemistry

Balance the following redox reaction in basic solution. H2(g)+Fe3+(aq) ---> H2O(l)+Fe2+(aq)

*asked by Anonymous on October 23, 2016* -
## Chemistry

How much corn syrup should be added to water to make 200 ml of a 10% by volume solution?

*asked by P on March 14, 2009* -
## chemistry

Concentrated sulfuric acid (18.3 M) has a density of 1.84 g/mL. How many moles of H2SO4 are in each milliliter of solution?

*asked by Anonymous on September 29, 2013* -
## math

find the solution to the system of equations by using either graphing and substitution y = 6 - x and y = x - 2 (2,4) (-4,2) (4,2) no solutions I think this one is the third answer am I right?

*asked by Nisabel on May 21, 2013* -
## chemistry

describe a method to determine if a solution is made of kci or C6 h12 o6 without tasting it

*asked by Anonymous on April 13, 2010* -
## chemistry

which solution has the lower pH? a)0.1 M HCL or 0.1 M HC2H3O2? b)0.1 M NaOH or 0.1 M NH3? c)0.1 M Na2CO3 or 0.1 M NaCl?

*asked by denis on November 9, 2011* -
## chemistry

The concentration of Mg2+ ion in a solution is 0.010M. At what pH will Mg(OH)2 first precipitate? (Given Ksp Mg(OH)2 equals 1.2*10-11)

*asked by Lisa on June 16, 2015* -
## science

. If you dissolve 70.0g of KNO3 at a temperature of 60.0°C, would the resulting solution be unsaturated, saturated, or supersaturated?

*asked by joulie on July 17, 2015* -
## ALGEBRA

Post your 50-word response to the following: Explain why the equation -6(x + 3) = -6x + 5 has no solution and 7x +18 + 8x = 8(x + 4) + 7x – 14 has infinitely many solutions.

*asked by SAMANTHA on March 8, 2010* -
## Math

Solve the inequality. Other than , graph the solution set on a number line. 12x - 3 > 3(3x - 9)

*asked by DK on March 8, 2010* -
## Science

Find out the molality of acetic acid ch3cooh whose molarity is 2 and density of solution is 1.20 g/ ml ?

*asked by Kamal on April 29, 2013* -
## Science

Find out the molality of acetic acid ch3cooh whose molarity is 2 and density of solution is 1.20 g/ ml ?

*asked by Kamal on April 29, 2013* -
## CHEMISTRY

Ignoring activities, determine the molar solubility (S) of Zn(CN)2 in a solution with a pH = 1.94. Ksp (Zn(CN)2) = 3.0 × 10-16; Ka (HCN) = 6.2 × 10-10.

*asked by Anonymous on June 3, 2015* -
## Chemistry

if 25.0 mL of 15M nitric acid is diluted to 125 mL, what is the concentration of the new solution? i got 3M but i don't think its right

*asked by Anonymous on March 4, 2014* -
## maths

x^4+3x-2/(x^2+1)^3(x-4)=(Ax+B)/(x^2+1)+(Cx+D)/(x^2+1)^2+(Ex+F)/(x^2+1)^3+H/(x-4)+G/(x-4)^2.find ABCDEFGH?plz solve it a partial fraction i serious need the solution urgently

*asked by anthony on July 28, 2015* -
## Chemistry

Balance the following equation for a basic solution. MnO4-+C2O4-2= Mno2 + CO3-2

*asked by Brittney on October 27, 2013* -
## Chemistry

if 25.0 mL of 15M nitric acid is diluted to 125 mL, what is the concentration of the new solution? i got 3M but i don't think its right

*asked by Anonymous on March 4, 2014* -
## government secondary school

maths:x^4+3x-2/(x^2+1)^3(x-4)=(Ax+B)/(x^2+1)+(Cx+D)/(x^2+1)^2+(Ex+F)/(x^2+1)^3+G/(x-4)+H/(x-4)^2.fine the value of ABCDEFGH,it a partial fraction o plz i need the solution urgently

*asked by Anonymous on July 28, 2015* -
## chemistry

Determine the volume of a 0.550 M KMnO4 solution required to completely react with 2.80 g of Zn.

*asked by sie on February 14, 2012* -
## math

If 6 is added to the numerator and denominator of the fraction 7/9,what will be the value increase or decrease ?by how much ?i need solution answer

*asked by sheirra on September 17, 2016* -
## Chem

what is the pH of solution made by mixing 100 mL of 0.030M HCL with 200 mL water?

*asked by John on September 16, 2012* -
## Chemistry

What is the [CrO4] in a 2.5 L saturated solution of lead (II) chromate to which 0.05 mol Pb(NO3)2 is added?

*asked by Josh on April 29, 2012* -
## Algebra 2

Use synthetic division to divide p(x) = 3x3 − 10x2 − 31x − 12 by (3x + 5). Then check the solution.

*asked by Linda on January 19, 2016* -
## Chemistry

What is the pH of a .0035 M Ba(OH)2 solution. I did -log(.0070) to find pOH So 14-2.15=11.85 pH? Just want to double check.

*asked by Sarah on March 22, 2013* -
## algebra

solve the inequality and write the solution set using interval notation. 4x+7

*asked by Anne on September 15, 2012* -
## math

8 gallons per hour each gallon wt. 7 1/4 in six hours what is the amount in pounds?? and how did you arrive at this solution??

*asked by dw on October 21, 2013* -
## Chemistry

The Ka values of H3PO4 are shown below. Ka1 7.5 10-3 Ka2 6.2 10-8 Ka3 4.8 10-13 What is the pH of a 0.19 M solution of NaH2PO4?

*asked by Chem Confused on April 12, 2010* -
## Chemistry

What is the molarity of a solution prepared by dissolving 4.92 g of calicum nitrate in 250 mL of water?

*asked by Ambra on May 1, 2012* -
## Chemistry

How many grams of KF do you need to weigh in order to prepare 500. mL of solution with a concentration of 0.250 M?

*asked by Kiley on April 29, 2008* -
## Chemistry

What mass of glucose (C6H12O6) must dissolve in 400.0 g of ethanol to make a 1.60 m solution?

*asked by ELissa on March 9, 2017* -
## Chemistry

The solution "head" dissolves in the water and the mixing "tail" dissolves in the oil. or The mixing "head" dissolves in the water and the solution "tail" dissolves in the oil. which one is right? thank you for your time!

*asked by Baby on April 17, 2008* -
## Chemistry

In basic solution, H2O2 oxidizes Cr+3 to Cro4^-2 and is reduced to OH-. What is the balanced equation?

*asked by Cynthia on February 22, 2012* -
## chemistry

if an antacid tablet was dissolved in water would the solution become acid, base or neutral? why?

*asked by Anonymous on October 9, 2010* -
## Algebra

Solve by substitution method. 6x+9y=-12 -5x+y=27 What is the solution of the system? Type an ordered pair... Please help Thanks!

*asked by Sadie on May 5, 2009* -
## chemistry

What is the molarity of a solution prepared by dissolving 2.41 g of potassium iodide, KI in 100 mL of water?

*asked by Ambra on May 6, 2012* -
## chemistry

The bottle of hydrogen peroxide from the store says it is a 3% solution by mass. What is its molal concentration?

*asked by billy bob j on April 17, 2008* -
## Math

2 liters of cleaning solution is 65% ammonia. How much water must be added to dilute it to a 40% soulition?

*asked by Ashley on September 29, 2016* -
## Pre-Calculus

Find the unknown in the following equation. If there are more than one solution, then separate the solutions with a comma. (−8y−4)^2+10=14 y=? I keep on getting y=-0.5, is that correct?

*asked by Ann on October 6, 2013* -
## chemistry

If you begin with 0.030 L of a 2.5M NaOH solution, what concentration will you end up with if you dilute it to 0.050?

*asked by Anonymous on February 22, 2016* -
## chemistry

What is the titer of the iodine solution of the .1000g sample of pure ascorbic acid 25.32 ml I2

*asked by saddee on April 28, 2009* -
## Chemistry

How many moles of Cacl are needed to be dissolved in .500g of H2O to form a 1.5m solution?

*asked by Ty on March 24, 2010* -
## HELP

Can a solution of CrCl3 be stored in an aluminum container? I did the math part- E= 2.45 (approx)

*asked by scilover on May 9, 2013* -
## Algebra....HELP!!

Use the elimination method to solve the system of equations a + 6b =4 a + 3b = -2 What is the solution in an ordered pair?

*asked by Theresa on September 9, 2012* -
## Chemistry

What volume of 0.174 M Na3PO4 solution is necessary to completely react with 89.1 mL of 0.106 M CuCl2?

*asked by Anonymous on October 10, 2010* -
## Chemistry

What is the molarity of a solution that results when 3.64 g KCl is dissolved in water and diluted to exactly 200.0 mL?

*asked by Van on February 27, 2016* -
## Math

Twenty equals four decreased by twice an unknown number. I need the equation and the solution please I'm almost finished!!!!!!!!!!!!!!!!!!!!

*asked by Briana on April 21, 2009* -
## Chemistry

Determine the volume of a 0.550 M KMnO4 solution required to completely react with 2.55 g of Zn.

*asked by Andrew on March 19, 2010* -
## Math

(x+20)(x-9)(x+10)>0 Please help? I'm stuck...need to find the solution set. so far I have x^3+21x^2-70x-1800>0 am I correct so far? What do I need to do next?

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

How many milliliters of 0.135 M HCl are needed to completely neutralize 56.0 mL of 0.101 M Ba(OH)2 solution?

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

3.5 liters of H2O are added to 500 mL of a 2.0 M HNO3 solution. What is the resulting molarity?

*asked by Riley on March 25, 2010* -
## 8th grade

can u help me to find the product of -4x^2 and x^3 + 2x^2 - 5x + 3 and the solution to the equation of x^2 + 30x = 1000...I came up with -20 and 50 but i don't think it is right..can u help also can you help me to do the factorization of 6x^2 - 2x -

*asked by JT on May 26, 2009* -
## chemisrty

what is the final concentration of a solution if 100mL of water is added to a 25mL of 5.0 M NaCl?

*asked by mandy on November 16, 2011* -
## pre-calculus

the function has a real zero in the given interval. approximate this solution correct to two decimal places: f(x)=x^4-x^3-7x^2+5x+10; (2,3)

*asked by hawra on March 13, 2010* -
## CHEMISTRY

Find the amount of CuSO4.5H2O needed to prepare 500 mL of 0.25 M solution.

*asked by Sarah on February 20, 2012* -
## Chemistry

The equilibrium constant for the following reaction is 7.2 x 10-10. What is the [H+] in a solution 1.0 M of this acid? HCN + H2O --> H3O+ + CN-

*asked by Andrea on May 13, 2012* -
## chemistry

What is the equilibrium concentration of ammonium ion in a 0.77 M solution of ammonia (NH3, Kb = 1.8 ´ 10–5) at 25oC?

*asked by Anonymous on April 5, 2010* -
## value

what happens when a solution of iron 2 sulphate in a test tube was bubbled through chlorine gas

*asked by value on September 24, 2016* -
## chemistry

What is the equilibrium concentration of ammonium ion in a 0.77 M solution of ammonia (NH3, Kb = 1.8 ´ 10–5) at 25oC?

*asked by Anonymous on April 5, 2010* -
## chemistry

A 11.0% (w/v) solution of ethyl alcohol is diluted from 51.0 mL to 230.0 mL. What is the new weight/volume percent?

*asked by Kyle on February 21, 2012* -
## MAth

I keep getting -28/19 for this problem, but it doesn't check with the solution in the back of the book. Help please.. solve the equation 7d-(1/2)(2d-4)=(-5/4)(d+4)

*asked by Anonymous on September 6, 2012* -
## chemistry

How much water must be added to 20liter of 12molar base solution to make it 8molar?

*asked by merry lyn on November 15, 2011* -
## chemistry

How much water must be added to 20liter of 12molar base solution to makt it 8molar?

*asked by merlinda on November 15, 2011* -
## Algebra

|x+9| is greater than or equal to 0. Solve and graph the solution set on a number line.

*asked by Anonymous on March 19, 2010* -
## maths

find the general solution for the equation: sin2x+ square root 3cosx =0

*asked by allie on May 9, 2013* -
## Gen.Chem2

what mass(g) of NH3 must be dissolved in 475g of methanol to make a 0.25m solution

*asked by Anonymous on February 23, 2014* -
## chemistry

What is the carbonate-ion, CO3-2, concentration in a 0.037 M carbonic acid solution? a. 1.2 ´ 10-4 b. 4.2 ´ 10-7 c. 7.6 ´ 10-8 d. 4.8 ´ 10-11 e. 5.2 ´ 10-19

*asked by iby on May 14, 2010* -
## CHEMISTRY

what is the percent by mass of solution (d =1,3g/ml) of urea ((NH2)2CO) with molarity 8,4mol/l?

*asked by EDWARD,ESOBUNETA on December 13, 2015* -
## algebra ll

Show the work to solve |2x+5| -1 < 6 and describe the graph of the solution in a complete sentence.

*asked by justina on August 30, 2011* -
## Quantitative Chemistry

Ignoring activities, determine the molar solubility (S) of Zn(CN)2 in a solution with a pH = 4.36. Ksp (Zn(CN)2) = 3.0 × 10-16; Ka (HCN) = 6.2 × 10-10.

*asked by Chrystal on November 11, 2013* -
## cal

Use Euler's method with step size0.4 to estimatey(2) , where y(x) is the solution of the initial-value problem y'=4x+y^2, y(0)=1. . y(2)=

*asked by carlton on March 12, 2012* -
## chemisty

A bottle labeled 0.150Msulfuric acid contains a solution with what concentration in sulfate ions?

*asked by sarah on September 27, 2010* -
## Algebra

Determine which point, if any, is in the solution half-plane of the two variable inequality. 3x – 2y < 6 Select one: a. (4, 1) b. (-1, -5) c. (1, 0) d. (2, -2

*asked by Mark on February 20, 2014* -
## science

If boiling permanganate eliminates possible reducing agents in a solution, do I still need to do blank titration?

*asked by aimee on February 5, 2009* -
## CHEMISTRY

What mass of NaCl is required to precipitate all the Ag ions from 20 mL of .100 M AgNO3 solution

*asked by CIndy on April 22, 2013* -
## CHEMISTRY

What substances will increase the molar solubility of nickel(II) phosphate in a saturated solution?

*asked by Anonymous on May 3, 2010* -
## chemistry

how many grams of NaOH pallets containing 12% moisture are requiredto prepared 60 ltr of 0.5N solution

*asked by shweta on May 19, 2015* -
## physical science

zinc electrode is placed in a solution of lead nitrate.write a balanced equation

*asked by mphukhe on August 20, 2015*

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