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Morgarella [4.7K]
3 years ago
7

Need answer asap

Chemistry
1 answer:
Gala2k [10]3 years ago
3 0
The answer is A, true
You might be interested in
Calculate the concentration of acetic acid and acetate ion in a 0.2 M acetate buffer at pH 5. The p K a of acetic acid is 4.76
Levart [38]

Answer:

[Acetic acid] = 0.07 M

[Acetate] = 0.13 M

Explanation:

pH of buffer = 5

pKa of acetic acid = 4.76

pH=p_{Ka} + log\frac{[Salt]}{[Acid]}

Now using Henderson-Hasselbalch equation

5=4.76 + log\frac{[Acetate]}{[Acetic\;acid]}

log\frac{[Acetate]}{[Acetic\;acid]} = 0.24

\frac{[Acetate]}{[Acetic\;acid]} = 1.74  ....... (1)

It is given that,

[Acetate] + [Acetic acid] = 0.2 M     ....... (2)

Now solving both the above equations

[Acetate] = 1.74[Acetic acid]

Substitute the concentration of acetate ion in equation (2)

1.74[Acetic acid] + [Acetic acid] = 0.2 M

[Acetic acid] = 0.2/2.74 = 0.07 M

[Acetate] = 0.2 - 0.07 = 0.13 M

5 0
3 years ago
8.00*10^-5 mol was diluted to 500ml what is the concentration in Mol/L?
OLEGan [10]
Make sure all units are consistent. Convert ml to L first. (500ml = 0.5L). Then divide the mole by the volume which would result to 1.6*10^-4mol/L. This can also be expressed as interms of molarity (M). 1 M = 1 mol/L hence the final answer is <span>1.6*10^-4 M. </span>
8 0
4 years ago
Read 2 more answers
If 2.65 mol of O2 gas has a volume of 49.0 L at 180 C, what is the pressure of the gas?
adoni [48]

Answer:

2.01atm

Explanation:

5 0
3 years ago
A balloon is filled with 500mL of helium at a temp of 27C and 75mmHg. What volume in mL will it have when it reaches an altitude
pickupchik [31]

Answer:

The answer to your question is: V = 60.3 ml

Explanation:

Data

V1 = 500 ml

T1 = 27°C = 300°K

P1 = 75 mmHg = 0.098 atm

V2 = ?

T2 = - 33°C = 240°K

P2 = 0.65 atm

Formula

                            \frac{P1V1}{T1}  = \frac{P2V2}{T2}

                            V2 = \frac{P1V1T2}{T1P2}

                            V2 = \frac{(0.098)(500)(240)}{(300)(0.65)} \

                            V2 = \frac{11769}{195}

                            V2 = 60.3 ml                        

5 0
3 years ago
The point on a magnet Where magnet effect is strongest is called ​
notsponge [240]

Pole

Explanation:

A magnetic pole is the point on a magnet where a magnet effect is strongest. Around a magnet, there are magnetic fields.

  • The magnetic fields are force fields that leaves the north poles and enters through the south.
  • The pole is where magnetic effects are the strongest.
  • It is around the pole that the strongest magnetic effect on a magnet or magnetic material is felt.
  • The strength of magnetic fields are strongest at the poles.

learn more:

electromagnet brainly.com/question/2191993

#learnwithBrainly

5 0
4 years ago
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