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Mekhanik [1.2K]
3 years ago
9

Morphine is an effective pain killer but is also highly addictive. calculate the ph of a 0.105 m solution of morphine if its pkb

= 5.79.
Chemistry
1 answer:
Dmitriy789 [7]3 years ago
8 0
First, we have to get Kb from this formula:

Pkb = - ㏒ Kb
by substitution by Pkb value = 5.79
5.79 = -㏒ Kb 
∴Kb = 1.62x10^-6
From the ICE table 
                    morphine    ↔       C+          +          OH-
initial               0.105                    0                         0 
change            -X                        +X                      +X
Equilibrium    (0.105-X)                X                         X


So Kb = [C+] [OH-]/[morphine]
by substitution
1.62x10^-6 = X^2 / (0.105-X)
X^2+ 1.6x 10^-6 X - 1.68x10^-7 / (X- 0.105) = zero by solving the equation for X
∴X =4 x 10 ^-4 or 0.0004
∴[OH-] = 0.0004
by substitution we can get POH
when POH = -㏒[OH-]
                   = -㏒0.0004
                   = 3.398 
and when PH + POH = 14 
∴PH = 14 - 3.398 = 10.6  

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Summarize the relationship between volume, temperature and pressure (use words like “inversely
Alinara [238K]

Answer:

P and V: inversely proportional

P and T: directly proportional

V and T: inversely proportional

Explanation:

For pressure and volume, as the volume goes up, meaning the container gets bigger, the pressure would go down. There would be more room in the container, so there would be less collisions between the molecules themselves and between the molecules and the container. This makes them inversely proportional.

For pressure and temperature, as the pressure goes up, there are more collisions, so the particles move faster. Temperature is the speed of the particles, so, since both pressure and temperature would go up at the same time, they are directly proportional.

For volume and temperature, this is similar to the PV relationship. As volume increases, there are less collisions between the particles. This means that the particles are going to move slower. Therefore, as volume goes up, temperature goes down, so they are inversely proportional.

Sorry this is super long, but I hope it fully explains the question for you! ☺

4 0
4 years ago
Exactly one mole of an ideal gas is contained in a 2.00-liter container at 1,000 K. What is the pressure exerted by this gas?
levacccp [35]
Use PV =nRT

so P = nRT/V

= 1 mole(0.08205 L atm/K mol)(1000K) / 2 L

= 41 atm
7 0
3 years ago
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Tems11 [23]

Answer:

The answer is D

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Which of Graphs 1 correctly represents the relationship between the pressure and Kelvin temperature of a gas?
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6 0
3 years ago
A 25.0g tin sample was placed in boiling water at 99.5 C until it had the same temperature. Afterwards, the tin sample was place
MrMuchimi

Answer : The specific heat of tin is, 0.213 J/g.K

Explanation :

Formula used :

q=m\times c\times (T_{final}-T_{initial})

where,

q = amount of heat lost = -399.4 J

c = specific heat capacity of tin = ?

m = mass of tin = 25.0 g

T_{final} = final temperature = 24.5^oC=273+24.5=297.5K

T_{initial} = initial temperature = 99.5^oC=273+99.5=372.5K

Now put all the given values in the above formula, we get:

-399.4J=25.0g\times c\times (297.5-372.5)K

c=0.213J/g.K

Therefore, the specific heat of tin is, 0.213 J/g.K

7 0
3 years ago
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