The process involves cleaning the platinum or nichrome wire with concentrated hydrochloric acid and placing it in a flame until no colour is produced. Then the wire is dipped in the acid again and then into the compound to be tested and placed back in the flame. Different compounds produce different flame colours.
Nichrome wire can be used as an alternative to platinum wire for flame testing by colouring the non-luminous part of a flame to detect cations such as sodium, potassium, copper, calcium, etc.
how hot does Nichrome wire get? The Type A Nichrome Wire has a high temperature range up to 1150°C or 2100°F.
Consequently, how do you clean a Nichrome wire?
Clean a platinum or nichrome (a nickel-chromium alloy) wire by dipping it into concentrated hydrochloric acid and then holding it in a hot (non-luminous) Bunsen flame. Repeat this until the wire doesn’t produce any colour in the flame.
What is Nichrome made up of?
Nichrome, a non-magnetic alloy that is commonly made up of 80% nickel and 20% chromium, has a resistivity ranging from 1.10 × 10−6 Ωm to 1.50 × 10−6 Ωm (0.00000110 Ωm to 0.00000150 Ωm) and a very high melting point (~1400 °C).
What is Nichrome wire?
Nichrome wire is an alloy made from nickel and chromium. It resists heat and oxidation and serves as a heating element in products such as toasters and hair dryers. Hobbyists use nichrome wire in ceramic sculpture and glassmaking.
Is Nichrome wire a good conductor of electricity?
Nichrome is a good conductor, being a metal having resistivity much higher than all insulators. However, its resistivity is much higher than copper or aluminium, which makes resistance from this metal large enough to get a workable value in very small dimensions. Hence it is used as a resistance material.
Where can I buy Nichrome wire?
There are many household items have Nichrome wire. It includes as follows: 1. Electric Oven Toaster – it is located inside the toaster, on top and bottom portion, when you see a ceramic tube inside, break that tube and you can find a spring like wire inside, that is nichrome.
Is Nichrome an insulator?
Is nichrome an insulator or conductor? It is a conductor and mostly to be found in heating elements. It is also a alloy of nickel and chromium and costlier than copper.
How do you measure the temperature of a wire?
The only way you would be able to measure that with an infrared (the laser just shows where you are pointing it) thermometer would be to attach a copper plate to the wire and measure the temperature of that. Because copper is such a great conductor of heat, that would give you near real-time results.
What is constantan wire?
Constantan Definition Constantan is a Nickel-Copper based alloy wire that has a high resistivity and is mainly used for thermocouples and electrical resistance heating. It has a constant resistivity over aa wide range of temperature.
Why is HCl used in flame test?
The purpose of using conc. HCl is to convert the compounds into their metallic chlorides. Because, the metallic chlorides are very much volatile. When heated in the flame the elements of the metals of the compounds become excited and go to higher energy levels.
Why is it important to use a clean Nichrome wire?
Explanation: Each element has a unique spectrum due its electron configuration. The element can be identified by the spectral lines in the flame test. Cleaning the nichrome wire will limit the spectral lines seen to one element making the identification easier.
Why is Nichrome wire used?
Nichrome wire is used as a heating element because it is very stable, even at high temperatures. Ironically, nichrome actually has low electrical resistance, the property that causes the wire to heat. Electrical resistance is a measure of how difficult it is for electricity to flow through something.
Why Pt wire is used in flame test?
1) Platinum doesn’t impart any color to the flame. 2) It is not oxidised under the high temperature of the flame from a bunsen burner. A platinum wire is cleaned by dipping it into concentrated HNO3 and then placing it in the non luminous part of the bunsen flame.
Which wire is used for heating?
Why is a non luminous flame used for flame test?
The “luminous Bunsen flame” should not be used for a flame test, the clear blue ‘non-luminous flame’ should be used, because: The air-starved, fuel-rich, incandescent carbon soot filled luminous flame is a chemically different test environment than the clear blue flame.