Search results
Results from the WOW.Com Content Network
These are used to create the colors in pyrotechnic compositions like fireworks and colored fires. The color-producing species are usually created from other chemicals during the reaction. Metal salts are commonly used; elemental metals are used rarely (e.g. copper for blue flames).
Flame coloring is also a good way to demonstrate how fire changes when subjected to heat and how they also change the matter around them. [1] [2] To color their flames, pyrotechnicians will generally use metal salts. Specific combinations of fuels and co-solvents are required in order to dissolve the necessary chemicals.
Graphite – also used as opacifier in rocket fuels to prevent heat transfer by radiation into lower layers of fuels and avoid the related explosions; Carbon black – produces long lasting fine gold sparks in fireworks, also used as opacifier in rocket fuels; Asphaltum – carbon-based fuel, also used as a binder. Some forms contain ammonia ...
Strontium chloride (SrCl 2) is a salt of strontium and chloride.It is a 'typical' salt, forming neutral aqueous solutions. As with all compounds of strontium, this salt emits a bright red colour in flame, and is commonly used in fireworks to that effect.
Like many other strontium salts, strontium nitrate is used to produce a rich red flame in fireworks and road flares. The oxidizing properties of this salt are advantageous in such applications. [3] Strontium nitrate can aid in eliminating and lessening skin irritations.
Other metal oxides can be used, such as chromium oxide, to generate the given metal in its elemental form. For example, a copper thermite reaction using copper oxide and elemental aluminium can be used for creating electric joints in a process called cadwelding , that produces elemental copper (it may react violently):
Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.
Eutectic mixtures of alkali metal nitrates are used as molten salts. For example, a 40:7:53 mixture of NaNO 2: NaNO 3:KNO 3 melts at 142 °C and is stable to about 600 °C. [4] A minor use is for coloring the light emitted by fireworks: [5] lithium nitrate produces a red color, sodium nitrate produces a yellow/orange color,