Ask Question
ChemistryChemistry
10 July, 22:46

6) Find the pH of the following solutions:

a) 0.00010 M HClO4

b) 2.35 x 10-3 M HI

c) 4.678 x 10-5 M HNO3

d) 0.0000877 M HCl

e) 0.00020 M HF

f) 0.0000061 M H3O+

g) 4.3 x 10-3 M NaOH (This is a base! Remember you will be finding pOH first!)

h) 6.7 x 10-9 M KOH (This is a base! Remember you will be finding pOH first!)

i) 0.00044 M HCl

j) C

+2
Answers (2)
  1. 10 July, 23:45
    0
    Answer: A. 4 B. 2.6 C. 4.3 D. 4.1 E. 3.7 F. 5.8 G. 11.6 H. 5.8 I. 3.4

    Explanation:

    A. 0.00010 M HClO4

    pH = - log [1.0 x 10^-4]

    = 4 - log 1 = 4

    B. 2.5 x 10^-3 M HI

    pH = - log [2.5 x 10^-3]

    = 3 - log 2.5

    = 3 - 0.398 = 2.6

    C. 4.678 x 10^M HNO3

    pH = - log [4.678 x 10^-5]

    = 5 - 0.7 = 4.3

    D. 0.0000877M HCL

    pH = - log [8.77 x 10^-5]

    = 5 - 0.943 = 4.057 = 4.1

    E. 0.00020M HF

    pH = - log [2.0 x10^-4]

    = 4 - 0.301 = 3.7

    F. 0.0000061M H3O+

    pH = - log [ 6.1 x 10^-6]

    = 6 - 0.785 = 5.2

    G. 4.3 x 10^-3 M NaOH

    Finding pOH first, we have

    pOH = - log [4.3 x 10-3]

    = 3 - 0.633 = 2.4

    pH + pOH = 14

    pH = 14 - 2.4 = 11.6

    H. 6.7 x 10^-9 M KOH

    Finding pOH, we have,

    pOH = - log [6.7 x 10^-9]

    = 9 - 0.826 = 8.17 = 8.2

    pH + pOH = 14

    pH = 14 - 8.2 = 5.8

    I. 0.00044 M HCl

    pH = - log [ 4.4 x 10^-4]

    = 4 - 0.64 = 3.36 = 3.4
  2. 11 July, 01:23
    0
    pH is the negative logarithm of hydrogen (oxonium) ion concentration of aqueous solutions.

    Explanation:

    Recall that pH is defined as the negative logarithm of hydrogen ion concentration. We are going to apply that definition here.

    a) 0.00010 M HClO4

    pH = - log[0.00010]

    pH = 4

    b) 2.35 x 10-3 M HI

    pH = - log[2.35 x 10-3 ]

    pH = 2.63

    c) 4.678 x 10-5 M HNO3

    pH = - log[4.678 x 10-5]

    pH = 4.3

    d) 0.0000877 M HCl

    pH=-log[0.0000877]

    pH = 4.1

    e) 0.00020 M HF

    pH = - log[0.00020]

    pH = 3.7

    f) 0.0000061 M H3O+

    pH = - log[0.0000061]

    pH = 5.2

    g) 4.3 x 10-3 M NaOH

    pOH = - log[OH^-]

    pOH = - log[ 4.3 x 10-3 ]

    pOH = 2.4

    But

    pH + pOH = 14

    Therefore

    pH = 14-pOH

    pH = 14 - 2.4

    pH = 11.6

    h) 6.7*10^-9 M KOH

    pOH = - log[OH^-]

    pOH = - log[ 6.7 x 10-9 ]

    pOH = 8.2

    But

    pH + pOH = 14

    Therefore

    pH = 14-pOH

    pH = 14 - 8.2

    pH=5.8

    I) 0.00044M HCl

    pH = - log[0.00044]

    pH = 3.4
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “6) Find the pH of the following solutions: a) 0.00010 M HClO4 b) 2.35 x 10-3 M HI c) 4.678 x 10-5 M HNO3 d) 0.0000877 M HCl e) 0.00020 M HF ...” in 📙 Chemistry if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
What makes the Pre-Archean time different from the others?
Answers (1)
How does water vapor makes clouds
Answers (1)
A balloon is at a height of 30 meters, and is rising at the constant rate of 5 m/sec. A bicyclist passes beneath it, traveling in a straight line at the constant speed of 10 m/sec.
Answers (1)
Balance the following Equation: ___Zn + ___HCl - -> ___ZnCl2 + ___H2 50g of zinc are reacted with 50g of hydrogen chloride. Calculate the amount of excess reactant. A - 4.2g B - 5.1g C - 1.4g D - 2.3g
Answers (1)
Which of the following is not a water soluble
Answers (1)
New Questions in Chemistry
In the process of covalent bonding, atoms share electrons. This means that * a) Electrons from each atom are attracted to the nucleus of both atoms b) Protons and neutrons attract c) Atoms lose electrons and become ions d) Atoms gain electrons and
Answers (2)
Give the full atomic symbol for an atom that has 30 neutrons and an atomic number of 25
Answers (1)
Maxwell, a russian scientist, created an early peridoc table of the elements. true or false
Answers (2)
Can the nature of a reactant be altered to speed up reaction
Answers (1)
What describes the basis of the band theory of metallic bonding
Answers (1)
Home » Chemistry » 6) Find the pH of the following solutions: a) 0.00010 M HClO4 b) 2.35 x 10-3 M HI c) 4.678 x 10-5 M HNO3 d) 0.0000877 M HCl e) 0.00020 M HF f) 0.0000061 M H3O+ g) 4.3 x 10-3 M NaOH (This is a base! Remember you will be finding pOH first!) h) 6.
Sign Up Forgot Password?