TutorMe homepage
Subjects
PRICING
COURSES
SIGN IN
Start Free Trial
Ridwan H.
Tutor for two years
Tutor Satisfaction Guarantee
Organic Chemistry
TutorMe
Question:

How can ethanol be obtained ONLY from cracking?

Ridwan H.
Answer:

Pass steam at 300°C through ethene in a vessel, with the presence of Phosphoric Acid catalyst to speed the reaction up. Ethanol is the only product formed and a pure sample can be extracted by menas of fractional distillation.

Chemistry
TutorMe
Question:

Three 500ml beaker each containing one of HCl, HBr and HI solutions. The labels have been misplaced, describe an experiment to identify the solutions.

Ridwan H.
Answer:

Process: 1) Extract 10ml of each sollution and place in three seperate measuring cylinders 2) Using distilled (de-ionized) water, dilute the solution to 30ml 3) Add nitric acid to each of the solutions in excess to neutalise any carbonate ions that could render the results inaccurate. 4) Add 5 drops of Silver Nitrate to each cylinder. Observation White, Pale Yellow and Cream precipitates (ppt) should form. Results: the solution with white ppt contained HCl the solution with pale yellow ppt contained HI the sollution with cream ppt contained HBr Safety Precautions: Wear gloves and safety goggle Notes: **silver nitrate is added as the sollution contains Nitric Acid and thus the results will npt be tampered with impurities.**

Physics
TutorMe
Question:

Describe Terminal Velocity.

Ridwan H.
Answer:

When an object is in free fall in a fluid(gas or liquid), it will continue to accelerate against the fluid until the fluid resistance (ex: air resistance) is equal to that of the acceleration of the object. This phenomenon results in the object continuing to decend at a steady speed as the amount it is accelerating is equal to the amoumt it is decelerating or in other words, the downward pull(weight) on the object is equal to the upward push(air resistance). This can be described as terminal velocity.

Send a message explaining your
needs and Ridwan will reply soon.
Contact Ridwan
Ready now? Request a lesson.
Start Session
FAQs
What is a lesson?
A lesson is virtual lesson space on our platform where you and a tutor can communicate. You'll have the option to communicate using video/audio as well as text chat. You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.
How do I begin a lesson?
If the tutor is currently online, you can click the "Start Session" button above. If they are offline, you can always send them a message to schedule a lesson.
Who are TutorMe tutors?
Many of our tutors are current college students or recent graduates of top-tier universities like MIT, Harvard and USC. TutorMe has thousands of top-quality tutors available to work with you.