Be sure to answer all parts. what is the [h3o+] and the ph of a buffer that consists of 0.26 m hno2 and 0.89 m kno2? (k, of hno2 = 7.1 x 10-4) fh 0+1= x 10 m (enter your answer in scientific notation.) ph =

Answer : The ion concentration is, and the pH of a buffer is, 2.95

Explanation : Given,

Concentration of (weak acid)= 0.26 M

Concentration of (conjugate base or salt)= 0.89 M

First we have to calculate the value of .

The expression used for the calculation of is,

Now put the value of in this expression, we get:

Now we have to calculate the pH of the solution.

Using Henderson Hesselbach equation :

Now put all the given values in this expression, we get:

The pH of a buffer is, 2.95

Now we have to calculate the ion concentration.

The ion concentration is,

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".