Thursday, November 7, 2019
Carry out test on different compounds and write down what it looks like Essays
Carry out test on different compounds and write down what it looks like Essays   Carry out test on different compounds and write down what it looks like Essay  Carry out test on different compounds and write down what it looks like Essay                                                                                                                                                                                                Wear safety goggles when carrying the flame test and appropriate clothing. Take small quantity hydrochloric acid.  When busen burner is not being used, close the air hole so that you can see the yellow flame. Keep your clothing away from the flame.  Calcium acetate  Irritant to eyes. Avoid raising and it also irritant to eyes.                    Keep it away from water it could cause water to boil if because of the salt. Contact with combustion material may cause fire.  Lithium sulphate  Reacts violently with water and acids liberating a highly flammable gas (hydrogen).  Can cause burns and it reacts vigorously with water to form lithium hydroxide which is corrsive.it reacts dangerously with nitric acid and ignites on contact with metal.  Irritant to eyes and skin also harmful by ingestion in quantity and effect of ionic balance in the blood.  Sodium carbonate  Irritant to eyes skin and respiratory system.  Potassium chloride  Explosive when mixed with combustion materials. Never use fabric gloves to handle substance.  Harmful if inhaled or swallowed. Solution labelled if stronger then 2m .it may cause your eyes and skin to irritate.  These substances are dangerous with material like sugar, wood, clothes and etc.these solution ignite easily burn vigorously when dry. This should not be made available in the lab with concentrated sulphur.  Copper oxide  Harmful if swallowed. Dust irritates lungs and which could cause a health risk. It is dangerous with aluminium, magnesium. Explosives mixers are formed.  Do not react copper oxide with aluminium in thermite reactions.  Important = If you spill any chemicals on your skin and eyes quickly wash it for it for 10 min and if you can still feel it keep it like that until you dont feel anything. Then get it checked by doctor.  METHOD  * Put three drops of hydrochloric acid on the watch glass.  * Light the Bunsen burner and open its air hole to give a roaring flame.  * Then dip the loop at the end of nichrome wire into the acid and heat it in the busen burner until the flame is no longer coloured. (This process cleans the wire, burning off the previous remains of any sample.)  * Then use a spatula and add a little sodium salt to the acid on the watch glass  * Mix the salt with the acid using the loop at the end of the wire. Tap the loop against the dry part of the watch glass to remove the acid.  * Hold the loop in the edge of the flame.  * Then record the colour of the flame in the table. Then I choose from the following colours: -brick red (orange red), green (with blue streaks); lilac (pale purple); yellow.  RESULTS TABLE  METAL  CATION  COLOUR OF FLAME  SODIUM  Na+  YELLOW  POTASSIUM  K+  LILAC  CALCIUM  CA 2+  ORANGE  COPPER  CU2+  GREEN  LITHIUM  LI+  RED  CONCLUSION  I found the colour of different metal when I flame tested each of them. I found that when you burn sodium you get a yellow colour, when you burn potassium you get a lilac colour. This also shows us that cat ion is positively charged. This will also help me identify the chemical colours when they are burning.    
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