Explain what is the ph of a buffered system

Assignment Help Chemistry
Reference no: EM13181795

what is the pH of a buffered sysem made by dissolving 17.42 g of KH2PO4 and 20.41 g of K2HPO4 in water to give a volume of 200.0 mL? The Ka2 for dihydrogen phosphate is 6.2 X 10^-8 and the equilibrium reaction of interest is

H2PO4-(aq) + H2O(l) = H3O+(aq) + HPO4-(aq)

Reference no: EM13181795

Questions Cloud

How big of a grant would make this project worthwhile : A university spent $1.8 million to install solar panels atop a parking garage. These panels will have a capacity of 500 kw, have a life expectancy of 20 years and suppose the discount rate is 10%. If electricity can be purchased for costs of $0..
What is the width of the path : a pool measuring 10 meters by 16 meters is surrounded by a path of uniform width. If the are of the pool and path combined is 272 square meters, what is the width of the path?
Plot the straight line developed from linear trend equation : Plot the straight line developed from the Linear Trend equation, and the actual Peak demand versus the time, with time being the independent variable.
Determine the amplitude, period and phase shift : Determine the amplitude, period and phase shift of Y = ½ sin (x+π) and graph one period of the function.
Explain what is the ph of a buffered system : what is the pH of a buffered system made by dissolving 17.42 g of KH2PO4 and 20.41 g of K2HPO4 in water to give a volume of 200.0 mL?
How many test were sold last year : 350 million test are expected to be sold this year. this represents 114% increase from last year. how many test were sold last year?
What happens to the shape of the rectangle : if a rectangle is redrawn so that its area remains constant but its perimeter increases, what happens to the shape of the rectangle?
For what numbers of check per month will the acu-checking : the hudson bank offers two checking-accont plans. their anywhere plan charges $.20 per check whereas their acu-checking plan cost $2 per month plus $0.12 per check. for what numbers of check per month will the acu-checking plan cosl less?
What is the probability that the sample contains : customer from Cavallaro's Fruit Stand picks a sample of 4 oranges at random from a crate containing 65 oranges, of which 5 are rotten. What is the probability that the sample contains 1 or more rotten oranges.

Reviews

Write a Review

Chemistry Questions & Answers

  What is the partial pressure of ethane in the flask

A 1-L flask is filled with 1.10g of argon at 25C . A sample of ethane vapor is added to the same flask until the total pressure is 1.25amt .What is the partial pressure of argon, in the flask? What is the partial pressure of ethane in the flask.

  Calculate the ph for cases in the titration

Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.160 M HClO(aq) with 0.160 M KOH(aq). The ionization constant for HClO 4.0*10-8.

  Calculate the empirical formula of the product

when 0.273-gm of Mg is reacted at high temperatures with N2 to produce 0.378-gm of a solid, MgxNy. Calculate the empirical formula of the product.

  Determine the empirical and molecular formulas

determine the empirical and molecular formulas of a hydrocarbon which has a molecular weight of 84 mass unit which contains 85.7% carbon.

  Explain how to correct for partial pressure of water vapor

explain how to correct for the partial pressure of water vapor when calculating the partial pressure of a dry gas that is collected over water.

  Explain the concentration of this compound in the sample

The concentration of this compound in the sample is 0.000030 M and the path length of the sample is 1.0 cm

  State does ph have an effect on the cell potential

Does pH have an effect on the cell potential (Ecell) for the following oxidation-reduction reaction? 5Fe^2+(aq) + MnO4^-(aq) + 8H^+(aq) ---> 5Fe^3+(aq) + Mn^2+(aq) + 4H20(l)

  What is the volume of water that was cooled

To cool a volume of water from 176° K to 100° K, 7.9 x 104 J of heat energy must be removed. What is the volume of water that was cooled?

  What is the h+ concentration of an aqueous solution

What is the H+ concentration of an aqueous solution with a pOH= 4.38 at 25 degrees celcius.

  How are the princible of le chatelier used to increase

How are the princible of Le chatelier's used to increase the percentage yield in the production of ammonia in the haber process?

  Define what is the ka of hcooh

What is the Ka of HCOOH? What is the base on the left side of the equilibrium? What is the conjugate base on the right side of the equilibrium?

  How many grams of nano3 remain in solution

A solution containing 80. G of NaNO3 in 75 g of H2O at 50°C is cooled to 20°C. How many grams of NaNO3 remain in solution at 20° C?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd