Some Fundamental Definitions In The Science of Chemistry - Problem Solving
The world and environment, in which we live in, is controlled by a higher being, and, many chemical elements, which are visible and invisible to the human eye, are a big part of the design of life.
In order to understand better our world, a good amount of knowledge, about the chemical elements, which are around us, is definitely needed.
Alright, so we are going to continue our conversation, in the area of Chemistry, in today’s article, we are going to talk about the path, which chemists take, to solve chemical problems.
If you want to learn chemistry, you are going to have to learn, how to solve chemical problems.
You will find these chemical problems, when you take a chemistry class, and you have to pass tests, in order to pass the class.
You will also have to face, chemical problems, which are a lot more complex, then the ones, you take on a test; in society, and in your professional and personal life.
You will approach many problems in life scientifically, and you won’t even be aware of it, until after the fact, if you know chemistry of course.
Many problems we face in life, follow the same scientific approach, because we use observation, experiment and model, to solve our daily life problems.
Now in order to solve chemical calculations on a test, you must know that all measured quantities, consist of a number and a unit, meaning that you will normally see the melting point of Hydrogen shown as -434.5°F, this is -434.5 as the number and the F as the unit.
When you perform calculations, in chemistry, remember that units can be multiplied, divided, and canceled out.
Which means that, the arithmetic operations, used with measured quantities, are the same as those used, in pure numbers.
You’ll need to know this, to solve questions such as:
What is the distance of a school bus, which traveled in 2 hours, if it travels at 50 miles per hour?
Distance = 2h * 50 mi / 1h = 100 mi
Notice how the hour was cancelled out of the equation, to only leave the 100 mi, because that’s all we wanted to know, was the miles traveled, in two hours.
In order to express a measured quantity, in different units, chemists, used ratios known as conversion factors.
Let’s say instead of miles, we wanted to know the distance, of the school bus, in feet, we of course, would have to convert the miles to feet.
In order to convert miles to feet, chemists, use equivalent quantities, in order to construct the desired, conversion factor.
When you choose a conversion factor, it won’t be a matter of chance or memorization, but instead chemists make sure, that the chosen conversion factor, will cancel, all units except those required for the answer.
You should think through the chemical calculations, in order to decide whether the answer expressed, in the new units, should have a larger or smaller number.
As a chemist you should also decide, if the conversion factor you choose, will help you arrive at the best answer.
Thank you, for reading this article!!!