suggest a method to separate these mixtures , ball bearings from ping-pong balls.and oil from oil-water mixtu

Question

and how we can separate iron filingsfrom sand. experimental or physically or chemically.

Answer 1

To seperate the ping pong balls from the ball bearings, use water. If you put them all in water, the ping pong balls will float and the ball bearings will sink. Depending on what the ball bearings are made of, you could also use a magnet to seperate them (assuming the bearings are magnetic).
For oil and water, it is easiest to find a container with a pour spout or opening at the BOTTOM and drain the water out, leaving the oil in the container. Alternately, you could chill the combo to near 32 degrees F, which will solidify the oil and allow you to remove it from the water. Of course, this temperature depends on the type of oil being used, and the water may freeze first. Either way, one will likely freeze before the other. This can also be done by dragging an ice cube through the mixture, but with less success, and again it depends on the type of oil.
TO seperate iron filings from anything I would suggest a magnetic solution. Just run a magnet over the sand, and the iron filings will literally jump out of the sand onto the magnet. Just keep going and you'll eventually get all the iron.

Answer 2

You'd have a pretty hard time mixing ping pong balls and bearings in the first place. They'll always stay seperate.
Oil and water are seperated by heating the mixture. Oil can sort of homogenize in water, but it comes back to the top when warmed up. Oil companies do it that way when they get a mix out of the ground.

Answer 3

It depends upon the size of the ball bearings. If they are a lot smaller than the ping-pong balls, use a grid. The ball bearings will fall through and the ping-pong balls will not.

Oil floats on water, so, let it all settle and then either skim the oil off the top or drain the water from under it.

Ir on filings can be extracted using a magnet, providing that the sand is not magnetic.

Answer 4

These are easy ones. The ball bearings are smaller than ping pong balls, so you can use a screen for that one.
Oil is less dense than water so just let them sit together a while then skim it off the top. And you can use a magnet to get the iron filings out of the sand.

Answer 5

Interesting answers!

What happens when you pour you mixture of ball bearings and ping pong balls into a bucket of water.

If you have a jar of water and vegetable oil, and let it sit, and find some tubing, how can you get one of the liquids out of the jar.

Now for the sand and iron filings, you need a magnet, a piece of cardboard and your sand & iron. Think you can figure this out so the magnet isn't all furry with iron filings?

Good Luck.

Answer 6

I tried, but my power caused a crack in the table and now I have no where to play. It seemed like a good solution at the time when I couldn't find the Ping Pong ball.

Answer 7

U would use a Separating Funnel to separate oil and water.
You would simply pour the 2 liquids into the funnel. Leave the separating funnel to stand for a few minutes.
The two liquids would then settle out forming distinct layers.
It is expected the the one with the higher density, would settle at the bottom and the one with the lower density would float on top. Turn the tap on the separating funnel (vertical to release the liquid) and use a conical flask or beaker to collect the liquid at the bottom......then u would have the oil and water separted....

Hope this helps.....

Answer 8

One more thing-- you could always dump the ball bearing/ping-pong ball mixture in a tub of water-- the bearings will sink...

Answer 9

ball bearing from ping pong balls - magnet
iron from sand - magnet
oil from water - allow the oil to float to the top and siphon it off

Answer 10

bb, PP balls: magnetic separation, flotation in water, screens

Iron,sand: magnetic separation.

oil,water: decantation.