flame test lab report - hypothesis?
460409
Just guess what the colors would be for different compounds before you actually do the flame test for the hypothesis.  \nOr you could guess whether it is the cation (the positively charged metal ion) or the nonmetal anion that is responsible for the different colors.
628073
please modify your question and add a study hypothesis of what
977182
Who cares, all flames are hot.\n\n"The color and temperature of a flame are dependent on the type of fuel involved in the combustion."
612104
The explanations of fire in most standard reference works, not to put too fine a point on it, suck. The Encyclopaedia Britannica, for example, takes the following ineffectual stab: "rapid burning of combustible material with the evolution of heat and usually accompanied by flame." No wonder people have lost faith in science. Time to let a professional show how it's done. We'll start by reviewing the defects of the EB definition.\n\n(1) Rapid burning. OK, fire burns rapidly. Slow combustion, also known as oxidation, includes such nonfiery processes as rusting and digestion. However, to say that fire involves burning is to embark on a circular definition: What is fire? When something burns. What is burning? When something is on fire. We need to address the matter in more basic terms.\n\n(2) Combustible materials. Redundant. If a material is capable of rapid burning, by definition it's combustible. Also, "materials" is needlessly vague. One specific material, oxygen, is always involved.\n\n(3) Evolution of heat. I don't know what this is supposed to mean either.\n\n(4) Usually accompanied by flame. "Usually accompanied by" my arse. Flame is the quintessential pyrolytic phenomenon, not a mere by-product.\n\nNow for a proper definition, devised by myself: "Fire is the rapid combination of oxygen with fuel in the presence of heat, typically characterized by flame, a body of incandescent gas that contains and sustains the reaction and emits light and heat." Let's go through this bit by bit:\n\n(1) Rapid combination of oxygen with fuel in the presence of heat. Oxygen, fuel, and heat are the essential ingredients of fire. \n\n(2) Typically characterized by flame. The pup qualifier "typically" allows me to sidestep the issue of apparently nonflaming fires, like you get with burning charcoal. I suspect charcoal fires do create flame--you just can't see it due to the lack of impurities or incompletely burned fuel in the plume. (You can't see a fuel fire at an Indy or CART race either, because the cars run on clean-burning methanol.) But that's a matter we can leave for another day.\n\n(3) Body of incandescent gas. Flame defined. Most encyclopedia and dictionary definitions blow past this entirely, allowing persons such as yourself to imagine that fire is "pure energy" or similar nonsense. We say "body" because the gas has a characteristic structure and composition. We say "incandescent" because (a) it sounds scientific, (b) it means "luminous with intense heat," precisely what we are attempting to convey, and (c) if the Teeming Millions are going to learn one vocabulary word today, by God "incandescent" should be it.\n\n(4) Contains and sustains the reaction. Flame isn't just the result of fire; it is the fire. What's more, without the flame's heat the fire would go out.\n\n(5) Emits light and heat. Duh. However, we mustn't overlook the obvious.  \n\n>>>why do things that are put in it come out totally destroyed?\n\nOf course most things that go into fire aren’t totally destroyed. Most metals, glass, ceramic and so forth all emerge unscathed from fire. Even wood and paper aren’t totally destroyed, they leave an ash and charcoal residue as well as fine particles that we can see as soot and smoke.\n\nFire will ‘destroy’ anything organic that can be completely oxidised at the temperature that it burns at, but that is simply because the oxidation process converts the organic material to carbon dioxide,  and water. IOW the material isn’t destroyed it is just converted to gas and that gas blows away.\n\n>>>>>what fuel does it need from say, paper,\n\nThe paper IS the fuel the fire needs. The fire converts the paper into gases and ash. Or more accurately fire is the process of converting paper into gases and ash.
257020
do you mean spontaneous combustion? I think thats just a myth.
1041787
I think you are talking about a Lab Report. You start with a hypothesis followed by a objective, steps taken, notes, and a conclusion (say if your hypothesis was correct and if your objective was completed).
578984
Test summary says negative\n\nI would say that is a pretty good interpretation
526456
No, it's evidence of combustion.  Radioactive decay is usually invisible unless you have film there to see the particles given off.
752459
This is a complete combustion.\nReaction:            aX + bO2 --> dCO2 + eH2O\nd = 0.811818182, derived from mass of CO2 and its Mr.\n\nX has 0.811818182 mol of C.\n\nOriginal sample has 0.811818182/ 1.626 x 60.095\n                                  = 30.00382143mol of C
1040415
I read a whole book of supposed  instances of spontaneous human combustion, and most of the time it was caused by excess drinking in a hot room or near a fireplace. It kinda makes sense because the amount of alcohol in your blood could cause you to be more flammable. Again, none of this is proven scientifically.
231717
I haven't heard of it. My attitude toward it, however, is to find out WHAT the actual tests consisted of. Though people test products all the time, it does not mean that they tested in a way that could possibly be accurate.
195490
yes. ive seen it on google video. and people go to the hospital for things lie that. its becuase of the mehtane produced, which s very flammable. that is why sometimes garbage dumps start on fire.
100009
I am not quite sure what the question is. What should the manufacturer do? Did they already do the experiments or do you want to know what sort of experiments to do? Do you want to know how to reduce the data? How to present the data? What statistical tools might be useful?
717107
Titles of Investigation Reports which have produced high marks.\n\n     1 The factors causing variation in the attenuation of perspex.\n     \n     2 Flow of water over notches and weirs.\n     \n     3 Contraction of adjacent turns of a coil due to current through\n     them.\n     \n     4 Investigation of factors involved in flow of powders and\n     crystals.\n     \n     5 Investigation of light from a 1.5 V bulb and relative amounts\n     light of different wavelength from it.\n     \n     6 Load/speed variation of parachutes.\n     \n     7 Study of splashes.\n     \n     8 Behaviour of thyratrons under varying conditions.\n     \n     9 Corona discharge.\n     \n     10 Forced convection.\n     \n     11 Fibreglass joints.\n     \n     12 Araldite bonds.\n     \n     13 Audio percussion induced vibrations in metal rod.\n     \n     14 Creep in copper wire.\n     \n     15 Effect of shelving on breaking of waves.\n     \n     16 Strengthening of ice by sawdust.\n     \n     17 Aerodynamic forces on a motor car.\n     \n     18 A liquid flow meter.\n     \n     19 Piezo electric effect.\n     \n     20 Use of eddy currents for >n-destructive testing.\n     \n     21 A wind powered generator.\n     \n     22 The formation of a water tornado.\n     \n     23 Electrostatic particle precipitation.\n     \n     24 Water impact with a plane surface of water.\n     \n     25 Distribution of air-borne pollution.\n     \n     26 An electrical analogue for water flow through locks.\n     \n     27 Pouring - factors making the ideal spout.\n     \n     28 Construction and use of a variable-interval coincidence counter\n     for study of short-lived isotopes in a radioactive decay.\n     \n     29 Factors which might be involved in the hanging of a chain of\n     uniform mass/unit length.\n     \n     30 Smoke rings.\n     \n     31 The effect of different periods of short-circuiting on the rate\n     of recovery of a dry cell.\n     \n     32 Pressure/volume relationship of a rubber balloon.\n     \n     33 Behaviour of drops on a hot plate.\n     \n     34 Feasibility of solar energy.\n     \n     35 Optimum aperture of a pin-hole camera\n     \n     36 Absorption of microwaves.\n     \n     37 A study and analysis-of rotational vortices.\n     \n     38 The control of sound in rooms.\n     \n     39 The effect of internal pressure on the performance of a\n     football.\n     \n     40 Conductivity of electrolytes in wood.\n     \n     41 Absorption of liquids by filter paper.\n     \n     42 Shapes of water columns flowing from tops.\n     \n     43 Shaded magnetic probes.\n     \n     44 Ionisation of air and van de Graff generators.\n     \n     45 Design of an automatically operating burette.\n     \n     46 Use of a photo-sensitive device as a photometer and application\n     to light emitted from a light bulb.\n     \n     47 Energy stored in a clock spring.\n     \n     48 Investigation of cling wrapping: Why does it cling?\n     \n     49 The production of a pump using the movement of ions in a\n     magnetic field.\n     \n     50 Magnetic suspension.\n     \n     51 Temperature in a flame.\n     \n     52 Absorption of electromagnetic waves by glass,\n     \n     53 Motor and dynamo effects on conducting liquids.\n     \n     54 The sound of sea as heard in sea shell Is.\n     \n     55 Performance of a fan\n     \n     56 Lightening valve rocker arms to improve engine performance.\n     \n     57 Phase change in an induction motor.\n     \n     58 Fringes in draining soap Films.\n     \n     59 Heat pulse in a rod\n     \n     60 Hovercraft.\n     \n     61 Properties of foam plastic.\n     \n     62 The singing of a kettle.\n     \n     63 Acoustics of a large room\n     \n     64 Relationship between the wavelength and changing concentration\n     in a fluoresrcent substance\n     \n     65 Rotating shafts.\n     \n     66 Craters.\n     \n     67 @king an accelerometer.\n     \n     68 The shape of a drop.\n
165350
wattage of the bulb is important...prob not generating enough heat to make the 'lava' flow (wax).\n\nIt should show signs of flow within an hour...at least!
43703
How about the red fountain experiment with acids and litmus solutions? mail me at pr4kane@yahoo.com for furhter details on it. u can try electroplating,bleaching by chlorine/so2,the brown ring test with sulphuric acid etc.
747645
A hypothesis is what you think will happen or what you are trying to prove.  There is no explanation of what you did in lab, but I am guessing that different people or groups of people did different things to the magnesium and the teacher wants you to see the different outcomes from the same substance in different situations.