Chemistry > QUESTION PAPER (QP) > AS Level Chemistry A H032/02 Depth in chemistry (All)

AS Level Chemistry A H032/02 Depth in chemistry

Document Content and Description Below

Answer all the questions. 1 Bromine is a reactive element. It combines with other non-metals to form covalent compounds. Phosphorus tribromide, PBr3, and iodine monobromide, IBr, are examples of co... valent compounds used in organic synthesis. (a) PBr3 can be prepared by heating bromine with phosphorus, P4. (i) Write an equation for this reaction. …………………………………………………………………………………………. [1] (ii) How many molecules are present in 1.3535 g of PBr3? number of molecules = ……………………… [3] (iii) The ‘dot-and-cross’ diagram of a molecule of PBr3 is given below. Name the shape of this molecule and explain why the molecule has this shape. name: ……………………………………………………………………………………….. explanation: …………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. [3] Specimen 3 © OCR 2014 H032/02 Turn over (b) Bromine reacts with iodine to form iodine monobromide, IBr. The table below lists some average bond enthalpies which are required in different parts of this question. Bond Average bond enthalpy / kJ mol−1 Br–Br +193 I–I +151 I–Br +175 (i) Average bond enthalpy is the enthalpy change for the breaking of 1 mole of bonds in gaseous molecules. Why do Br2 and I2 not exist in the gaseous state under standard conditions? ……………………………………………………………………………………………… [Show More]

Last updated: 1 year ago

Preview 1 out of 41 pages

Add to cart

Instant download

document-preview

Buy this document to get the full access instantly

Instant Download Access after purchase

Add to cart

Instant download

Reviews( 0 )

$6.00

Add to cart

Instant download

Can't find what you want? Try our AI powered Search

OR

REQUEST DOCUMENT
68
0

Document information


Connected school, study & course


About the document


Uploaded On

Jun 23, 2022

Number of pages

41

Written in

Seller


seller-icon
Jackie09

Member since 2 years

21 Documents Sold


Additional information

This document has been written for:

Uploaded

Jun 23, 2022

Downloads

 0

Views

 68

Document Keyword Tags

What is Browsegrades

In Browsegrades, a student can earn by offering help to other student. Students can help other students with materials by upploading their notes and earn money.

We are here to help

We're available through e-mail, Twitter, Facebook, and live chat.
 FAQ
 Questions? Leave a message!

Follow us on
 Twitter

Copyright © Browsegrades · High quality services·