![mickimlvn6128](/avatars/21442.jpg)
mickimlvn6128
11.03.2020 •
Chemistry
20 mL of an approximately 10% aqueous solution of ethylamine, CH3CH2NH2, is titrated with 0.3000 M aqueous HCl. Which indicator would be most suitable for this titration? The pKa of CH3CH2NH3 + is 10.75
Solved
Show answers
More tips
- L Leisure and Entertainment Choosing the Right Books to Read: Tips and Recommendations...
- L Leisure and Entertainment Couchsurfing: A New Way to Travel...
- G Goods and services Which TV is better - LCD or Plasma?...
- S Sport How to Learn to Pull Up on Monkey Bars?...
- L Leisure and Entertainment Scrapbooking: What is it and Why is it Becoming More Popular?...
- C Computers and Internet Where did torrents.ru move to?...
- B Business and Finance Understanding Cash Flow: What It Is and How It Works...
- C Computers and Internet What Are Peers and Seeds in Torrenting?...
- H Health and Medicine 10 Simple Techniques on How to Boost Your Mood...
- G Goods and services How to Choose the Right High Chair for Your Baby?...
Answers on questions: Chemistry
- C Chemistry When a atom gets smaller, what happens to the electronegativity ?...
- C Chemistry Can we measure the properties of several unknown solids? explain your answer....
- C Chemistry What is the empirical formula for naphthalene...
- B Business Required information[the following information applies to the questions displayed below.]prevosti farms and sugarhouse pays its employees according to their job...
- M Mathematics Can you me because i can’t do it right...
- B Business Adriana company is highly automated and uses computers to control manufacturing operations. the company uses a job-order costing system and applies manufacturing...
- E Engineering Arigid (constant volume) tank sealed by a valve initially contains 100 kg of air at a pressure of 100 kpa and 300 k. at time = 0, the valve for the air tank is...
- H History What idea did confucius introduce to social relationships in ancient china? the idea of filial piety, that children should respect and honor their parents and ancestors...
- A Advanced Placement (AP) Which document influenced our 3rd amendment eight of not having to quarter or house soldiers in our homes? magna carta petition of rights english bill of rights...
- H History Which country in southwest asia and north africa has taken steps to join the european union?...
Ответ:
Therefore, The indicator that is best fit for the given titration is Bromocresol Green Color change from pH between 4.0 to 5.6
Bromocresol green, color change from pH = 4.0 to 5.6
Explanation:
The equation for the reaction is :
concentration of
= 10%
10 g of
in 100 ml solution
molar mass = 45.08 g/mol
number of moles = 10 / 45.08
= 0.222 mol
Molarity of![C_2H_5NH_2(aq) = 0.222 \times \frac{1000}{100}mL](/tpl/images/0542/9187/70770.png)
= 2.22 M
number of moles of
in 20 mL can be determined as:
Concentration of![C_2H_5NH_2(aq) = \frac{44*10^{-3}*1000}{20}](/tpl/images/0542/9187/220a6.png)
= 2.22 M
Similarly, The pKa Value of
is given as 10.75
pKb value will be: 14 - pKa
= 14 - 10.75
= 3.25
the pH value at equivalence point is,
Therefore, The indicator that is best fit for the given titration is Bromocresol Green Color change from pH between 4.0 to 5.6
Ответ: