Solving Everyday Problems With Science:

Chemistry offers simple solutions to life's everyday little problems. Here are some easy tips to help get you through the day.

Test Eggs in Water

Here's a life hack to keep you from cracking open a bad raw egg. Place the egg in a cup of water. If it sinks, it's fresh. If it floats, you can use it for a stinky prank, but you won't want to eat it. A decaying egg produces hydrogen sulfide. This is the chemical responsible for the foul rotten egg stench. The gas also makes the bad egg buoyant in water.

Use Chemistry To Polish Silver

Silver reacts with air to form a black oxide termed tarnish. If you use or wear silver, this layer gets worn away so the metal stays fairly bright. However, if you keep your silver for special occasions, it can blacken. Polishing silver by hand may be good exercise, but it's not fun. You can use chemistry to prevent most of the tarnish from forming and to remove it without polishing.

Prevent tarnish by wrapping your silver before you store it. Plastic wrap or a plastic bag prevents air from circulating around the metal. Squeeze out as much air as possible before tucking the silver away. Keep silver away from humidity and products high in sulfur.

To remove tarnish electrochemically from fine silver or sterling silver, line a dish with aluminum foil set the silver on the foil, pour on hot water and sprinkle the silver with salt and baking soda. Wait 15 minutes, then rinse the silver with water, dry it, and marvel at the shine.

Make Better Ice Cubes

Use chemistry to make better ice! If your ice cubes aren't clear, try boiling the water and then freezing it. Boiling water drives off dissolved gases that can make ice cubes appear cloudy.

Another tip is to make ice cubes from the liquid you are drinking. Don't dilute lemonade or iced coffee with frozen water. Drop frozen lemonade or frozen coffee cubes into the drinks. Although you can't freeze hard alcohol, you can make ice cubes using wine.

Threading the Needle

There are tools that can make it easier to thread a needle, but if you don't have one, you can make the process easier by binding together the fibers of the thread. Lightly run the thread through a bit of candle wax or paint the end with nail polish. This binds the stray fibers and stiffens the thread so it won't bend away from the needle. If you have trouble seeing the thread, bright polish can make it easier to spot the end. Of course, the easiest solution to this problem is to find a youthful helper to thread the needle for you.

Ripen Bananas Quickly

You found the perfect bunch of bananas, except for one little problem. They are still green. You can wait around a couple of days for the fruit to ripen on its own or you can speed up the process using chemistry. Simply close your bananas in a paper bag, along with an apple or ripe tomato. The apple or tomato gives off ethylene, which is a natural fruit ripening chemical. On the flip side, if you want to keep your bananas from getting overly ripe, don't put them in the fruit bowl with other ripe fruit.

Add Salt To Make Coffee Taste Better

Did you order a cup of coffee, only to find it tastes like battery acid? Reach for the salt shaker and sprinkle a few grains into your cup of joe. Salt dissolves in coffee to release sodium ions. The coffee won't be any better, but it will taste better because the sodium blocks taste receptors from detecting the bitter notes.

If you are brewing your own coffee, you can add salt during the brewing process. Another tip to reduce bitterness is to avoid brewing coffee with super-hot water or letting it sit on a hot plate until the end of time. Too much heat during brewing increases extraction of the molecules that taste bitter while holding coffee on a hot plate eventually burns it.