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
The true statement about the Medicare Access and CHIP Reauthorization Act of 2015 (MACRA) Plans and the impact to Plans C and F are:
- "Consumers eligible for Medicare Part A on or after January 1, 2020,will not be able to purchase Medicare Supplement Insurance Plans C or F."
- "Consumers eligible for Medicare Part A before January 1 2020 can enroll in Plan C or F even after 2020 and can keep their plans as long as they choose."
<h3>What is
MACRA?</h3>
MACRA is an abbreviation for Medicare Access and CHIP Reauthorization Act of 2015 and it can be defined as a bipartisan United States statute (legislation) that was signed into law on the 16th of April, 2015, so as to change how the federal government pay physicians in the United States of America.
Based on the Medicare Access and CHIP Reauthorization Act of 2015 (MACRA) Plans, the impact to Plans C and F include the following:
- "Consumers eligible for Medicare Part A on or after January 1, 2020,will not be able to purchase Medicare Supplement Insurance Plans C or F."
- "Consumers eligible for Medicare Part A before January 1 2020 can enroll in Plan C or F even after 2020 and can keep their plans as long as they choose."
Read more on MACRA here: brainly.com/question/28045174
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Answer:
fat
Explanation:
the fat in the meat needs to break down to make it tender
Answer:
Explanation:
m -margherita pizza
c- cheese
Jan, 350m +200c =550 supply
Feb, 441m +252c =693 supply
from (month 1, 550) to (month 2, 693)
slope = 693-550/2-1 = 143
the slope is positive and is m= 143
