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
NikAS [45]
3 years ago
11

The ph of a 0.24 m solution of dimethylamine is 12.01. calculate the kb value for dimethylamine.

Chemistry
1 answer:
vlada-n [284]3 years ago
8 0
1- First we will get the value of POH from:

PH + POH = 14 

and we have PH = 12.01

∴ POH = 14 - 12.01 = 1.99 

2- Then we need to get the concentration of OH:

when POH = -㏒[OH]

           1.99 = -㏒[OH]

∴[OH] = 0.01 M

now we have the concentration at Equ by subtracting from the initial concentration of OH  = 0.24 M

∴ [OH] = 0.24 - 0.01 = 0.23 M

∴ Kb = (0.01)^2 /  0.22977 M

∴ Kb value = 4.4 x 10^-4

You might be interested in
WILL GIVE BRAINLEST!!
qwelly [4]
Coastal flooding occurs when normally dry, low-lying land is flooded by seawater.[1] The extent of coastal flooding is a function of the elevation inland flood waters penetrate which is controlled by the topography of the coastal land exposed to flooding.The seawater can flood the land via from several different paths:
3 0
3 years ago
Write the quantities 3 x 10^-4 cm and 3 x 10^4 km in ordinary notation
Goshia [24]
To write quantities in ordinary notation, you need to notice the power of the exponent.
If the power is positive, then you move the decimal point to the right by the number the power in exponent tells you.
If the power is negative, then you move the decimal point to the left by the number the power in exponent tells you.

We have:
3 x 10^-4 : the power of exponent is negative, therefore, we will move the decimal point 4 places to the left.
3 x 10^-4 = 0.0003 km

3 x 10^4 : he power of exponent is positive, therefore, we will move the decimal point 4 places to the right.
3 x 10^4 = 30000 km
6 0
4 years ago
The most common compound on earht is:
OlgaM077 [116]
The most common compound on earth is cellulose because it has enough energy to be the next source for biofuels. 
6 0
3 years ago
The attraction of like water molecules to each other is called _____.
Amiraneli [1.4K]
The attraction of like water molecules to each other is called cohension 
7 0
3 years ago
Deuterium is the isotope of hydrogen of mass number 2, with a proton and a neutron in its nucleus. The chemistry of deuterium is
s344n2d4d5 [400]

Answer:

True

Explanation:

We know that the zero-point-energy of a C-D system is quite lower than the zero point energy of the C-H bond so the C-D bond is stronger.

Kinetic isotope effect refers to the change in the rate of reaction owing to a change of one of the atoms of the reactants by replacing it with one of its isotopes.

Since we know that the C-D bond is stronger than the C-H bond, when we replace hydrogen with deuterium in a reaction's rate determining step we experience a little lag in the rate of reaction. This is referred to as the kinetic isotope effect in physical organic chemistry.

6 0
3 years ago
Other questions:
  • Explain the changes that take place at the molecular level when a substance is superheated or supercooled ?
    13·1 answer
  • HELP ASAP
    13·1 answer
  • How are biotic factors different from abiotic factors?
    14·1 answer
  • A sample of air with a volume of 2.20m3 at a pressure of 105 KPa and a temperature of 30c is cooled to 10c and the pressure is r
    10·2 answers
  • What term BEST describes this mineral's luster?<br><br> A. waxy<br> B. shiny<br> C. glassy
    15·1 answer
  • Which compound will have the most polarization?
    11·1 answer
  • I’ve been trying to figure this out for a few hours
    5·1 answer
  • It takes 83mL of a 0.45M NaOH solution to neutralize 235mL of an HCl solution.
    5·1 answer
  • How to find reaction force
    8·1 answer
  • Can someone help me?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!