0
The scope is to avoid interferences between different metals.
Chanel Huels
Wiki User
∙ 13y agoThis removes traces of previous samples which would otherwise affect the flame colour.
Wiki User
∙ 11y agoto sterilize it and kill all living bacteria
Wiki User
∙ 10y agoThe scope is to avoid interferences between different metals.
Wiki User
∙ 11y agoany impurities may give off a color in the flame test giving incorrect results for the test.
Wiki User
∙ 6y agoFor correct results any contamination must be avoided.
Add your answer:
Earn +20 pts
Why is hydrochloric acid used in cleaning the wire loop can other acids be used?
Hydrochloric acid is used because it is a simple antimicrobial agent and can sterilise the loop. Other materials can be used, but they may adhere to the loop and affect the results by introducing the acid to the growth.
Why is it important to use a clean nichrome wire for each flame test?
The wire simply holds the sample in the flame. Nichrome wire has such a high melting point that the relatively low temperature of the burning flame won't drive any of the Ni or Cr atoms into the ionic state and interfere with the color of the ions in the compound which is adhering to the wire.
What is the loop called for a group of atoms bonded together to form a closed loop in a molecule?
loop
What is a wire brush used for in chemistry?
There are many potential uses for a wire brush. They are used in industry for blending edges, appearance finishing and polishing. They can be used to remove rust and paint.
How do you test the copper two ions?
A Flame Test. Using a platinum or nichrome wire. Clean the wire in hydrochloric acid, Then dip the wire into a solution containing copper(II) ions. e.g. copper sulphate solution. The pass the wire through a Bunsen burner flame. The flame should burn a green/blue colour.
What are the essential parts of a transformer?
A magnetic core made of iron laminations, forming a closed loop, and two or more coils of copper wire wound to intersect the core.
Why is it required a clean wire loop in order to observe a spectrum?
Classic Wire Loop MethodFirst, you need a clean wire loop. Platinum or nickel-chromium loops are most common. They may be cleaned by dipping in hydrochloric or nitric acid, followed by rinsing with distilled or deionized water. Test the cleanliness of the loop by inserting it into a gas flame. If a burst of color is produced, the loop is not sufficiently clean. The loop must be cleaned between tests.The clean loop is dipped in either a powder or solution of an ionic (metal) salt. The loop with sample is placed in the clear or blue part of the flame and the resulting color is observed.Wooden Splint or Cotton Swab MethodWooden splints or cotton swabs offer an inexpensive alternative to wire loops. To use wooden splints, soak them overnight in distilled water. Pour out the water and rinse the splints with clean water, being careful to avoid contaminating the water with sodium (as from sweat on your hands). Take a damp splint or cotton swab that has been moistened in water, dip it in the sample to be tested, and wave the splint or swab through the flame. Do not hold the sample in the flame as this would cause the splint or swab to ignite. Use a new splint or swab for each test.
What are the difference between a wire loop and a wire needle?
ewan ko
Why if the same current flows in a wire coil and a single wire loop the magnetic field inside the coil is stronger than the field inside the loop?
why, if the same current flows in a wire coil and a single loop, the magnetic field inside the coil stronger than the field inside the loop
A loop of wire is placed within a magnetic field If the loop of wire is stationary as is the magnetic field will a current be induced in the wire?
No it will not. In order to get electrical activity you need motion. Either the magnet or the wire must move.
Why the loop is flamed after completing the inoculation?
because when we inoculate the culture with wire loop,some organism may be sticked to it which may be harmful or can cause trouble.so to destroy the remaining organisms wire loop is flamed again.
What describes the production of an electric current by moving a loop of wire through a magnetic field or moving a magnet through a wire loop?
moving a loop of wire through a magnetic Field. The rotation of a coil of copper wire trough a magnetic field changes magnetic field as "seen" from the coil inducing an alternating current.
Another name for a platinum wire loop?
oese
What is a circuit that only has one loop of wire?
series
Function wire loop?
The function of a wire loop is to transfer small amount of bacterial culture into broth. It is also used to move an agar plate for its continued growth.
When you loop the wire with a current it will?
increase the strenght of the magnetic field. :)
Why is clean water essential?
So you can have clean juice.
