100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached 4.2 TrustPilot
logo-home
Previously searched by you
Previously searched by you
logo
  • PEARSON (PEARSON)
  • Applied Science 2010 QCF
  • Unit 19 - Practical Chemical Analysis
To add items to your wishlist, you must be logged in
Answers

Assignment 1 unit 19 btec science extended diploma

Rating
2.7
(6)
Sold
15
Pages
8
Uploaded on
08-05-2019
Written in
2018/2019

This includes: P1, M1, D1 Task 1 A, Standard solution of KHP and titration of KHP with sodium hydroxide B, An acid - base titration -Questions on worksheet C, Experiment 3: titration of diluted vinegar against sodium hydroxide Task 2 A, Research primary and secondary standard Solutions, giving examples and their industrial and/ or commercial uses; B, using the results of your research and your calculations, decide which solution is a primary standard and which is a secondary standard: C, explain the need for primary and secondary standards in analysis: Task 3 A, Reliability of method used for titrating sodium hydroxide (NaOH) against hydrochloric acid (HCL): B. calculate the % error of the experiment b, which was titration of sodium hydroxide (NaOH) against hydrochloric acid (HCL) and explain how the errors could be reduced: (THIS WILL SHOW UP IN THE MARK BOOK AS PLAGIARISM AND YOU WILL GET EXCLUDED OUT THE COURSE) THIS WORK IS MEANT TO BE AS A REFERENCE OR GUIDANCE FOR YOU'RE WORK PLEASE RESPECT MY WORK AND MAKE SURE YOU GIVE ME CREDIT OR PUT IT IN YOU'RE OWN WORDS Thanks

Show more Read less
Institution
PEARSON (PEARSON)
Course
Unit 19 - Practical Chemical Analysis








Whoops! We can’t load your doc right now. Try again or contact support.
Report Copyright Violation

Written for

Study Level
BTEC
Examinator
PEARSON (PEARSON)
Subject
Applied Science 2010 QCF
Unit
Unit 19 - Practical Chemical Analysis
All documents for this subject (9)

Document information

Uploaded on
May 8, 2019
Number of pages
8
Written in
2018/2019
Type
Answers
Person
Unknown

Subjects

  • science
  • assignment 1
  • unit 19

Content preview

11053457


Task 1 P1 a. Exp 1


Standard solution of KHP and titration of KHP with sodium hydroxide



Burette solution Sodium hydroxide (NaOH) [0.1]

Pipette solution Potassium Hydrogen Phthalate (KhP)

Indicator Penolphatein


Trial 1 2 3 4
Final 24,00 48,45 24,00 48,40 24,00
Burette Initial 0 24,00 0 24,00 0
Readings
(cm3) Difference 24,00 24,00 0 24,00 24,00
Mean titrate (cm3) 24.2

Calculations:
Concentration of potassium hydrogen phthalate (KHP)

Word equation:
Potassium hydrogen phthalate + sodium hydroxide ￫Potassium sodium phthalate
+ water

Molecular equation:
KHC8H4O4(aq) + NaOH ￫KNaC8H4O4 + H2O
Molar mass of KHP (Mr) = 39 + (12x8) + 5 + (16x4) = 204
Mass of boat + KHP = 4.87 g
Mass of boat after transfer: 0.86 g

Mass of KHP transferred (m) : 4.87 - 0.86 = 4.01 g
Moles of KHP: (n = m/Mr) 4.01 ፥ 204 = 0.0197 mol to 3 sf


Volume of solution in volumetric flask (v) : 250 ፥ 1000 = 0.25 dm-3


Concentration of KHP solution: (C = n/V) 0.0197 ፥ 0.25 = 0.0788 mol dm-3
= 0.1 mol dm-3 to 1 d.p
$10.43
Get access to the full document:
Purchased by 15 students
100% satisfaction guarantee
Immediately available after payment
Both online and in PDF
No strings attached
Get to know the seller
Seller avatar
Reputation scores are based on the amount of documents a seller has sold for a fee and the reviews they have received for those documents. There are three levels: Bronze, Silver and Gold. The better the reputation, the more your can rely on the quality of the sellers work.
bziman
3.3
(54)

Reviews from verified buyers

Showing all 6 reviews
2 year ago

5 year ago

4 year ago

thank you for your review, if you need any work that is not uploaded yet be sure to text me and i will sort it out.

4 year ago

6 year ago

6 year ago

6 year ago

6 year ago

Thanks for your review, I’m very happy it was helpful, check my latest uploads, and make sure to text me if you need any specific assignments, thanx a lot and hope to see you soon❤️

2.7

6 reviews

5
0
4
1
3
3
2
1
1
1
Trustworthy reviews on Stuvia

All reviews are made by real Stuvia users after verified purchases.

Get to know the seller

Seller avatar
Reputation scores are based on the amount of documents a seller has sold for a fee and the reviews they have received for those documents. There are three levels: Bronze, Silver and Gold. The better the reputation, the more your can rely on the quality of the sellers work.
bziman CIE
View profile
Follow You need to be logged in order to follow users or courses
Sold
152
Member since
8 year
Number of followers
104
Documents
43
Last sold
2 year ago

3.3

54 reviews

5
18
4
9
3
12
2
3
1
12

Why students choose Stuvia

Created by fellow students, verified by reviews

Quality you can trust: written by students who passed their tests and reviewed by others who've used these notes.

Didn't get what you expected? Choose another document

No worries! You can instantly pick a different document that better fits what you're looking for.

Pay as you like, start learning right away

No subscription, no commitments. Pay the way you're used to via credit card and download your PDF document instantly.

Student with book image

“Bought, downloaded, and aced it. It really can be that simple.”

Alisha Student

Frequently asked questions