What's The Difference Between Flame And Non-Luminous Flame?

What is the difference between luminous flame and non-luminous flame?

The luminous flame is a yellow, orange, and bright flame. The non-luminous

flame is a blue, purple, and dark flame. The non-luminous flame is a type of

flame that is undergoing almost complete combustion.

What is the cause of the difference?

The cause of the difference is the quantity of oxygen that is mixed with gas. In

other words, the quantity of oxygen will determine whether the combustion is

complete or not complete.

Which flame is the one that we normally use in the lab? Explain.

We normally use the

non-luminous flame in the lab because the luminous flame
is not as hot as non-luminous flame.
What is is the function of the “tare or zero/on” button on the balance?
The function of the “tare” button on the balance is to re-calibrate the balance so
the scale will display zero.

Calculate the mass of sodium chloride/sand mixture from Part II. Show all work with units and significant figures.

The mass of sand mixture is 0.97 g. Work: 1.71 g - 0.74 g = 0.97 g

Explain the difference between decanting and filtration.(see procedures)

The difference between decanting and filtration is that decanting is the process

where you would pour the liquid out of the container to leave the solid behind. .

Filtration is where you would use a medium or a filter paper to separate the

solid and liquid.

What chemicals (substances) are in the filtrate?hOw do you know by your observations?

The substances in the filtrate are distilled water and salt. Based on my

observations, I saw liquid which i determined to be the water and I saw foggy

and light gray liquid which I determined to be caused by the salt.

a) Calculate the final mass of the sand in the filter paper form Part III. Show work w/units and

sf.
The final mass of the sand is 0.58 g. Work: 1.97 g - 1.39 g = 0.58 g
b) If you add the final mass of the salt to the final mass of the sand, should the
combined mass be equal, less than, or greater than the initial mass of the sodium
chloride/sand mixture(from question #5)? Explain your reasoning.
The final mass should be equal to the initial mass of the sand mixture because
according to the conservation of matter: “the principle that matter cannot be
created or destroyed.
9. Describe in detail how you could separate a mixture of sand, sugar, and iron filings.
Include a materials list, numbered procedure, and a results section. In the results
section, indicate at which point the three substances would be isolated.
Materials list: 5 g of the mixture of sand, sugar, and iron filings, 250 mL beaker,
graduated cylinder, 150 mL beaker, filter paper, funnel, glass stirring rod, ring
stand, magnet, a index card and water.
Procedure:
Pour the mixture into a 150 mL beaker
Use the graduated cylinder to measure 15 mL of water and pour it into the 150 mL beaker. Then use the stirring rod to mix and dissolve the sugar.
Set up the ring stand with the small ring. Fold the filter paper into fourth and put the filter paper into the small ring. Put the 250 mL beaker under the small ring
Pour the mixture into the filter paper and let the liquid go into the 250 mL beaker.
Set the liquid inside the 250 mL beaker outdoor and let it out in the sun until all the water evaporated.
Take the filter paper out of the small ring along with the solids.
Put the magnet on top of the filter paper and set the solid sticked to the magnet on the index card.
Results: After you finish the procedures, you should have already separated
the mixture. In step 5, you should see the sugar after the water has
evaporated. Then, in step 7, the iron filling should be on the index card.
Also, in step 7, the solid left on the filter paper should be the sand.

Conclusion:
In the Laboratory Investigation 1: Lab techniques, there are four purposes. First, the students learn the correct way of using laboratory equipments. Second, the students should learn and use laboratory apparatus in a skillfully and efficiently way. Third, the students should learn the correct names and purpose of all apparatus of the lab. Lastly, the students should display a positive approach toward lab safety.
During the lab, I made two mistakes. First, I wear the goggles in the beginning of the lab but I took off in the middle of the lab. I should always wear goggles inside the lab. The second mistake I made is that I used the 250 mL beaker to mix the mixture and to dissolve the salt while I am suppose to use the 100 or 150 mL beaker according the the procedure.
In the end, I should figure out ways to avoid these mistakes again. First, I should put a sticky note on the lab paper that says “Put on YOUR goggles at all times” to remind myself not to take off my goggles. Second, when I am using the beaker, I should always double check to see if I am using the correct beaker. This way, I can avoid mixing two different beakers.