Flame Test Lab

 



Introduction: Some metals ions can be identified by the color of their flame during a flame test. Different elements placed into a flame will turn the flame different colors.

Essential Question: What metals do colors indicate?  

 

chemical formula                                Name of metal                                   Color Produced

CuCl2                                                         copper                                                       Green

KNO3                                                         Potassium                                              Pink & Purple

Sr(NO3z)                                                    Strontium                                                    Red

CoCl3                                                         Cobalt                                                         Green

LiNo3                                                         lithium                                                     Red & Orange

MgCl2                                                        Magnesium                                            White-ish Sparks

KNO3                                                         Potassium                                                Pink & Purple

 

Questions: 1 - The inaccuracies involved when using a flame for identification purposes?

If your color blind you wont be able to recognize the colors correctly.

2 - it was easy to recognize elements that I didn't know is when they came up I would just right them down and look them up later.  

law of conservation of mass

 

 

part A
1st trial - 5.288g
2nd trial - 4.317g             <---- 1. Mass of apparatus before mixing
3rd trial - 5.387g
2. observations on mixing - turned white, a little bubbly
3. mass of apparatus after mixing.
1st trial - 5.450g
2nd trial - 4.941g
3rd trial - 6.137g

Part B
1st trial - 68.2
2nd trial - 63.4                <----- 1. mass of bottle, water , cap, and tablet
3nd trial - 65.3
2. observations after mixing - bubbling, dissolves
3. mass of apparatus after mixing
1st trial - 33.6
2nd trial - 40.5
3rd trial - 32.1
4. mass of apparatus after opening.
1st trial - 25.5
2nd trial - 22.9
3rd trial - 29.3
Part c
1. mass of apparatus before mixing.
1st trial - 3.962
2nd trial - 3.962
3rd trial - 3.948
2. observations on mixing - turned white
3. mass of apparatus after mixing.
1st trial - 3.919
2nd trial - 3.986
3rd trial - 3.918

1. for each experiment list the observations that suggest that a chemical reaction has taken place.
Part A
1st trial - 0.162
2nd trial - 0.624
3rd trial - 0.75
Part B
1st trial - a. 34.6  b.42.7
2nd trial - a. 22.9 b. 40.5
3rd trial - a. 33.2 b. 36
2. Part A = dropped
Part B = dropped then raised
Part C = dropped the raised then dropped again
3. yes because they are all close to each other