1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AleksandrR [38]
3 years ago
11

A chemist dissolves 867. mg of pure barium hydroxide in enough water to make up 170. mL of solution. Calculate the pH of the sol

ution. (The temperature of the solution is 25 degree C.) Be sure your answer has the correct number of significant digits.
Chemistry
1 answer:
Ilya [14]3 years ago
8 0

Answer: The pH of the solution is 11.2

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n = moles of solute

V_s = volume of solution in ml

moles of Ba(OH)_2 = \frac{\text {given mass}}{\text {Molar mass}}=\frac{0.867g}{171g/mol}=0.00507mol         (1g=1000mg)

Now put all the given values in the formula of molality, we get

Molarity=\frac{0.00507\times 1000}{170}

Molarity=0.0298

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

pOH=-\log [OH^-]

Ba(OH)_2\rightarrow Ba^{2+}+2OH^{-}

According to stoichiometry,

1 mole of Ba(OH)_2 gives 2 mole of OH^-

Thus 0.0298 moles of Ba(OH)_2 gives =\frac{2}{1}\times 0.0298=0.0596 moles of OH^-

Putting in the values:

pOH=-\log[0.0596]=2.82

pH+pOH=14

pH=14-2.82

pH=11.2

Thus the pH of the solution is 11.2

You might be interested in
A cycle of moon phases can be seen from earth because the
Otrada [13]

the Sun light from different parts of the Moon as the Moon revolves around the Earth

5 0
2 years ago
Why and how does atom change during time​
DerKrebs [107]

Adding or removing protons from the nucleus changes the charge of the nucleus and changes that atom's atomic number. So, adding or removing protons from the nucleus changes what element that atom is

7 0
3 years ago
What is the pH of a solution that contains 0.009 grams of oxalic acid in 100<br> mL of water?
tigry1 [53]

Answer:

pH = 3.0 ya that's it......

5 0
3 years ago
The enthalpy of formation of MX is ΔHf° = –525 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 139 kJ/mol. The ionization en
polet [3.4K]
I'm sorry but could you tell me IE2 I couldn't asks for details
3 0
3 years ago
Please help me, thank you
Bezzdna [24]

Answer:

it's C

Explanation:

Yes

5 0
3 years ago
Read 2 more answers
Other questions:
  • To preserve natural resources, which of the following should be recycled?
    11·1 answer
  • Write balanced complete ionic equation for the reaction cas(aq)+cucl2(aq)→cus(s)+cacl2(aq)
    15·2 answers
  • Substances that are more dense have ___________ (lower or higher) specific gravity.
    10·1 answer
  • Why is a shoe considered individual evidence
    15·2 answers
  • A gas occupies 5.6 liters at 0.860 atm. what is the pressure if the volume becomes 3.0L?
    12·1 answer
  • Valid experiment for does water and oil mix
    5·1 answer
  • 6. Why are ionic substances not known as molecules?
    6·2 answers
  • All members of group 8 have similair reactivity because
    10·1 answer
  • Which two properties apply to most elements that conducts heat: malleable, brittle, highly combustible, has free electrons
    8·1 answer
  • How is this effect of dissolved<br>substances important in nature?​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!