The calculated pH of the solutions are given below:
- The pH of the solution after 14.0 ml of base is added to it is calculated as 1.45.
- The pH of the solution after 19.8 ml of base is added to it is calculated as 3.0
- The pH of the solution after 20.0 ml of base is added to it is calculated as 7.
<h3>What is pH?</h3>
This is the level of acidity or alkalinity of an aqueous solution. The pH of a substances tells if its an acid, base or neutral.
HBr and NaOH while in water would dissociate and they would become H+ and OH- respectively.
Mol of HBr = Mol * Vol
= 0.200 * 20mL
= 4 mmol
A. Moles of NaOH added
= 0.2 X 14
= 2.8 mmol
Moles of H+ that did not react
= 4 - 2.8
= 1.2 mmol
1.2/1000 = 0.0012 moles
Total volume = 20 + 14
= 34 mL to litres
= 0.034 L
Molarity of H+ = 0.0012 / 0.034L
= 0.035 M
-log[0.035] = 1.45
The pH of the solution is 1.45
B. NaOH added = 19.8 * 0.2 =
3.96 mmoles
The unreacted solution
= 4.0 - 3.96
= 0.04 mmol
0.04/1000 = 0.00004 moles
Total volume = 20 + 19.8
= 39.8mL
Converted to litres = 0.0398L
Molarity = 0.00004 / 0.0398L
= 0.001
-log(0.001) = 3.0
The ph Is therefore 3.0
C. Moles of NaOH added = 0.2*20mL = 4mmol
All the H+ are going to be consumed here. This would result into a neutral solution pH = 7
<u>Complete question:</u>
20.0 mL sample of 0.200 M HBr solution is titrated with 0.200 M NaOH solution. Calculate the PH of the solution after the following volumes of base have been added.
A. 14.0 mL
B. 19.8 mL
C. 20.0 mL
Read more on pH here; brainly.com/question/22390063
Answer:
I wanted to tell her she shouldn't be playing Scrabble yet. Or looking in the mirror. Or turning the stereo any louder than what you needed just to hear it. It wasn't fair to Dad, and it wasn't fair to me.
Explanation:
Answer:
In the social sciences, a social group can be defined as two or more people who interact with one another, share similar characteristics, and collectively have a sense of unity.
Based on the information given bad debt expense is $8,675 and the journal entry is: Debit Bad debt $6,575; Credit Allowance for Doubtful Account $6,575.
<h2>a.
Bad debt expense:</h2>
Accounts Receivable Amount % Estimated Uncollectible
Current $65,000 2% $1,300
1–30 days past due $12,900 5% $645
31–90 days past due $10,100 30% $3,030
Over 90 days past due $7,400 50% $3,700
Total $8,675
<h2>b.
Journal entry:</h2>
March 31 2021
Debit Bad debt $6,575
Credit Allowance for Doubtful Account $6,575
($8,675-$2,100)
Inconclusion bad debt expense is $8,675 and the journal entry is: Debit Bad debt $6,575; Credit Allowance for Doubtful Account $6,575.
Learn more about bad debt expense here:brainly.com/question/24871617
Answer:
. TRANSITIVE OR INTRANSITIVE VERB
If you accept something that you have been offered, you say yes to it or agree to take it.
किसी बात को स्वीकार करना/स्वीकार करना
I accepted his offer of employment. All those invited to the conference have accepted.
accept a gift/donation/
