A buffer that contains 0.34 M of an acid, HA and 0.37 M of its conjugate base A-, has a pH of 3.26. What is the pH after 0.032 mol of HCl are added to 0.71 L of the solution

Answers

Answer 1

Answer: pH ≈ 3.186

Explanation:

[tex]p^{H} &=p^{k a}+\left[\frac{A^{-}}{H A}\right] \\3.26 &=p^{k a}+ \log \frac{0.37}{0.34} \\3.26 &=p^{k a}+\log\ 1.089 \\3.26 &=p^{k e}+0.037 \\p^{k a} &=3.26-0.1105 \\p^{k a} &=3.1495[/tex]

[tex]$0.34 \frac{\mathrm{mol}}{2} \times 0.71 \mathrm{~L}=0.2414 \ {\mathrm{mol} \rightarrow HA \\\\[/tex]

[tex]$0.37 \frac{\mathrm{mol}}{2} \times 0.71 \mathrm{~L}=0.2627 \ {\mathrm{mol} \rightarrow A^{-} \\\\[/tex]

[tex]$0.2414-0.032 \mathrm{mol}=0.2094 \mathrm{\ mol} \ HA[/tex]

[tex]$0.2627+0.032 \mathrm{mol}=0.2947 \mathrm{\ mol} \ A^{-}[/tex]

[tex]\begin{aligned}&p H=3.1495+\log\frac{0.2627}{0.2414} \\&p H=3.1495+0.0367 \\&p H=3.186\end{aligned}[/tex]

Therefore, the pH after 0.032 mol of HCl are added to 0.71 L of the solution is approximately 3.186

Related Questions

Magnetic field lines appear _____.

A farthest apart at the poles where the magnetic field is strongest
B closest together at the poles where the magnetic field is weakest
C closest together at the poles where the magnetic field is strongest
D farthest apart at the poles where the magnetic field is weakest

Answers

Answer:

Explanation:

A farthest apart at the poles where the magnetic field is strongest

What are some uses of radioactive dating?
HELPP PLEASEEEE!!!

Answers

Answer:

Radioactive dating is a method of dating rocks and minerals using radioactive isotopes. This method is useful for igneous and metamorphic rocks, which cannot be dated by the stratigraphic correlation method used for sedimentary rocks. Over 300 naturally-occurring isotopes are known.

Other Questions

If you have 19 cups full of water and 45 gallons of water. what does the gallon equals to how many cups of water? What property of operations is used to show that 12x + 6y is equivalent to(2x + y)? library is a good source of information why Read these lines from robert frosts "the road not taken." i shall be telling this with a sigh somewhere ages and ages hence: these lines most support a tone of somber reflection. neutral reflection. wistful reflection. hopeful reflection. There are 10 students in Class 1 and 40 students in Class 2.All 50 students sit a test.The mean score for the students in Class 1 was 80%The mean score for the students in Class 2 was 70%Find the mean score of all the students. Write an informative essay about the book/movie Wonder Complete and balance the equation for the reaction of sodium with water.Na+_H2O+ H2 Please help!consider the function f(x)=-(x+2)^2+42 + 4.a) in what form is this quadratic function written? _________________________b) list the values of the following parameters a = ______ h = ______ k = ______ vertex = ___________c) what will the a parameter do to this function? Which expression is equivalent to 3 square root of x^5 y A Goodyear Blimp is positioned at a height of 1,500 feet over the M&TBank Stadium to broadcast the Baltimore Ravens game. The blimp isobserved by a car of fans as they look upward at an angle of 22.Another car closer to the stadium can see the blimp if they lookupward at an angle of 65.DEOOVFigure notdrawn to scale1500 ft6522x ft.Determine x, the distance between the two cars. PLS I NEED THE ANSWER I GIVE U 100 POINTS IF U ANWSER do you think the un universal declaration of human rights is sufficient to protect against abuses of human rights What action did the Allied countries take after the war to help people who had been hurt by World War II?1. They removed all military supplies in rival countries. 2.They provided aid to citizens in countries destroyed by the war. 3.They allowed all citizens in destroyed countries to immigrate. 4.They overthrew the governments in countries destroyed by war. please answer quick Becket needs to solve the system of equations using elimination.-2x+4y=-2(6x-y=28) Which correctly describes the first step Becket should take?A. Multiply each term in the 1st equation by -3B. Multiply each term int he 1st equation by 3C. Multiply each term in the 2nd equation by -4D. Both B and C would work Exactly 150 years ago, students planted a tree in front of their school. Since then, the tree has grown 21 meters taller and the distance around the trunk has increased by 3 meters. Use pencil and paper. Describe how you can use this information to find at least two different unit rates. Then find these unit rates. The measures of heights (in inches) of a class of students are shown. 60, 60,54, 62, 62, 57,58, 65, 54,67, 63,57, 62, 54, 72, 66, 54, 69, 55, 61 Find the mean, median, mode, range, and standard deviation of the heights.b. A new student who is 7 feet tall joins your class. How would you expect this students height to affect the measures in part (a)? The term used for all floating and drifting organisms in the sea is: In negative self talk, personalizing is when a person _______. a. focuses only on their problems, ignoring their successes b. blames themselves for every problem, whether it was their fault or not c. believes that every situation will end badly d. see themselves as a failure for not living up to impossible standards please select the best answer from the choices provided a b c d The ability to generate many new ideas is known as:A. originality.B. fluency.C. appropriateness.O D. flexibility. I need help please provide the steps Keeram ordered 15 1/2 kg of juniper berries for her store. But 2/7 of them arrived bruised and mushy how many kg of useable berries did she receive?