Japan could be the ‘Dark Horses’. They probably are not going to win — but they could do well. The group’s tough, but not the toughest, they can easily win two out of three.
They’re aided by a couple of genuinely class players. Playmaker Shinji Kagawa is finally getting a decent run of matches at Manchester United and their linchpin Keisuke Honda remains greatly influential.
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Pour the vinegar into the bowl and add the salt — stir it up.
Put about 5 pennies into the bowl and count to 10 slowly.
Take out the pennies and rinse them out in some water. Admire their shininess!
There is some pretty fancy chemistry going on in that little bowl of yours. It turns out that vinegar is an acid, and the acid in the vinegar reacts with the salt to remove what chemists call copper oxide which was making your pennies dull. You’re not done yet, though, lets try another experiment:
Add more pennies to the bowl for 10 seconds, but this time , don’t rinse them off. Place them on a paper towel to dry off. In time the pennies will turn greenish-blue as a chemical called malachite forms on your pennies. But wait, you’re still not done yet.
Place one or two nuts and bolts in the vinegar and watch — they may become COPPER in color! The vinegar removed some of the copper from the pennies, if there is enough copper in the vinegar, the copper will become attracted by to the metal in the nuts and bolts and they will take on a new copper color — cool.
An egg sinks to the bottom if you drop it into a glass of ordinary drinking water but what happens if you add salt? The results are very interesting and can teach you some fun facts about density.
What you’ll need:One egg,Water,Salt,A tall drinking glass
Pour water into the glass until it is about half full.Stir in lots of salt (about 6 tablespoons).Carefully pour in plain water until the glass is nearly full (be careful to not disturb or mix the salty water with the plain water).Gently lower the egg into the water and watch what happens.
Salt water is denser than ordinary tap water, the denser the liquid the easier it is for an object to float in it. When you lower the egg into the liquid it drops through the normal tap water until it reaches the salty water, at this point the water is dense enough for the egg to float. If you were careful when you added the tap water to the salt water, they will not have mixed, enabling the egg to amazingly float in the middle of the glass.