A1
Help!
|
|
||||
|---|---|---|---|---|---|
| Identify the substance used to reduce titanium(IV) chloride to titanium. | magnesium
🗑
|
||||
| The reduction of titanium(IV) chloride to titanium cannot be carried out in air. The air has to be replaced with argon gas. Explain why | there is oxygen, nitrogen and water in the air, their presence will make titanium brittle.
🗑
|
||||
| Two advantages of electrolysis are that it is quicker and can be run continuously. Give two other reasons why electrolysis would be a more efficient method of extraction than the Kroll process. | has lower energy requirements, will give a purer product.
🗑
|
||||
| Complete and balance the chemical equation for the reaction of calcium hydroxide with sulfuric acid. (State symbols are not required.) |
🗑
|
||||
| Compare the similarities and differences between the extraction of aluminium and the extraction of chlorine by electrolysis. | similarities-ions free to move in both compounds
elements formed at both anode and cathode
use electricity to decompose compounds
diffrences -alumnia is a liquid while brine is an aqueos soulotion
electroylsis of brine requires less energy that brine
🗑
|
||||
| When brine is electrolysed, three useful products are formed: hydrogen, chlorine and sodium hydroxide. Describe where each product is formed during the electrolysis of brine. | hydrogen is formed atathode and ion go to cathode
chlorine ions form at anode and ions go to anode
sodium hydroxide is left behind in the solution
🗑
|
||||
| Explain how a transition metal works as a catalyst. | speeds up reaction
provides a surface for reaction to take place
provides an alternative pathway
🗑
|
||||
| Explain how alumina is extracted and purified from bauxite. You may include equations in your answer. | bayer process is used
bauxite cushed the reacted with sodium hydroixed to produce sodium alumiate
filter out solid imputies and crystilize to form alumium hydroixed
heat rotary kiln to ptoduce alumina
🗑
|
||||
| Explain how the diaphragm cell is used to produce sodium hydroxide, chlorine and hydrogen. |
🗑
|
||||
| Explain the effect of using a catalyst in the Haber process |
🗑
|
||||
| Explain the function of the membrane in the cell |
🗑
|
||||
| Explain why alumina must be dissolved before electrolysis can take place. |
🗑
|
||||
| Give two reasons why the electrolysis of alumina is expensive. |
🗑
|
||||
| Explain why manganese (IV) oxide can act as a catalyst. |
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
aishamselem01