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heat fixing
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Function of flame spreader?
to spread flame
How would you make sure a inoculating loop was sterile?
Pass the loop through a flame 2 or 3 times for about 10 seconds at a time.
What is the importance of heat fixing the slide before staining?
You heat fix a slide by passing it through a blue flame a couple of times (with th cells facing up). you do this to denature any enzymes that might lyse the cells or interfere with the staining procedure. you also use it kill the organism and to adhere the organism to the slide for staining
Different zones of candle flames?
These are the 4 zones of a candle flame from outermost to innermost A Non luminous zone . or zone of complete combustion b. Luminous zone or zone of incomplete combustion c. Dark zone or zone of no combustion d. Blue zone
What is the safety symbol for flammable?
a triangle with a flame inside
Why does the roaring flame from the Bunsen burner turn red after passing through the wire gauze?
burner usually gives off blue flame because it receives enough oxygen to keep it burning at full strength. but after passing through wire gauze the flame turns red because it then receives a disrupted, less and unsteady amount of oxygen. this also causes the temperature of the flame to fall.
What is the difference between a colorimeter and flame photometer?
A colorimeter is a scientific instrument that measures the intensity of light passing through a pure sample. In biology, colorimeters are used to monitor the growth of cultures. As the culture grows, the growing medium becomes more cloudy and absorbs more light.
What is the blue flame called of a Bunsen burner?
The blue flame is called a roaring flame and the yellow flame is called the safety flame.
What is a flame tested used for?
To identify an unknown sample by its emission spectrum
What is a class c bulkhead on a ship?
It means it is of an approved non-combustible material that will prevent flame passing through it for at least 30 minutes for the standard test.
What color does copper nitrate burn in a flame test?
The colour of any sample containing copper ions burns with a bluish green flame in the flame test.
Explain A charge insulator can be discharge by passing it just above a flame?
A charged insulator can be discharged by passing it just above a flame because a flame has a cloud of ions above it. Even though the overall charge above the flame is neutral, a charged insulator will use up the ions that it needs and neutralize.
Which setting gives the hottest flame when using a Bunsen burner?
The blue flame is the hottest... The yellow one is called a safety flame and if you swipe your hand qckly through the safety flame, it won't burn... If you do it quick enough
Why does when an unknown sample of a metal is placed in a flame a bright green light is released?
A green flame is due probable to copper.
What is the flame test used for?
To indentify an unknown sample by its emission light
when is flame test used?
to identify an unknown sample by its emission spectrum
A charged insulator can be discharged by passing it just above a flame explain how?
A charged insulator can be discharged by passing it just above a flame because a flame has a cloud of ions above it. Even though the overall charge above the flame is neutral, a charged insulator will use up the ions that it needs and neutralize.
