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The photometer measures the intensity of light and determines the shutter opens.
You're going to shoot this dirt bike like that?
I'm giving you some tips on photography to Luiza.
Tá sujinhas same.
But with this language, it will not understand anything. "Photometer", "shutter" ... Translate it! I want to learn too.
Look who's talking! You live "dropping" some difficult phrases when talking about chemistry?!
Relax, folks ... Each area has its own terms, their specific languages.
The math, for example, works with various symbols and codes! The music, with so many others ...
To better understand the language of either two or math or music, we know that these symbols and codes.
And there is a difference between "language", "code" and "symbol"?
It yes, look: we speak Portuguese, which is a language, right? So, this language is built with symbols, which can be letters or drawings.
Whipped! Letters are symbols we use to write and form words. In the case of people, words in Portuguese, our language. But what the codes?
Let's follow this example: the letters can be encoded, an event that is the Morse code.
I've heard of Morse code. Through the repetition of sounds that represent the letters you can communicate.
Exactly! The chemical also has a language. We use specific words to describe the chemical reactions and other processes.
Yes! And each chemical element is represented by a symbol.
The representation of an organic molecule, for example, is a symbol. It is very helpful to use these codes in time to describe an organic molecule, to simplify. Otherwise, we would use many words.
I love learning new and I propose we make a deal!
What deal is this?!
Eduardo teaches people to the language of photography. In return, we survey some of the symbols and codes of the chemical language with him! How about that?
I know nothing about photography. Deal?! Closed!
Hi, everyone! Joel! We need your help. We want to search for symbols and codes of chemical language.
And think of some reactions to study, to better understand what they mean. I've already started talking with them about photography photography.
Calm down, folks! I think I understand. Just do not understand that part of photography, but no matter. Now it will not give in to help, I'm late for an appointment.
But I know one person who can help. He knows a lot about the language of chemistry. He notes the phone there.
I really liked the hint of using the soap manufacturing as an example of a chemical reaction. Ever wanted to make soap.
It will be great for us to see the symbols and codes of chemical language!
That's used frying oil? Where's the food that was fried in there?
It is quiet, Eduardo! Let's watch.
The chemical reaction is represented by a chemical equation that illustrates the transformation occurred.
On the left are represented the reactants, separated by an arrow indicating the conversion of the reactants in the product pictured on the right.
Getting the soap takes place through chemical reactions. The main one is between the fatty acid ester and sodium hydroxide.
Sodium hydroxide is caustic soda, is not it?
Not quite. Sodium hydroxide is caustic soda. It is the main constituent of the caustic soda. Many people get confused.
For example, the acetic acid is not vinegar, but a component of vinegar. So on.
The products of the chemical reaction between the cooking oil and sodium hydroxide, caustic soda component, are basically the salt of fatty acid and glycerol. Both make up the soap.
Can I take two pieces? I'll need.
Do not, Edward! Will damage the aluminum!
But I would only clean the poor thing!
I know, but I'll explain. Bruno and Luisa calls and finds me in the lab that I show what would happen to your bike.
Yeah! Your bath has been delayed.
Soap attacks the aluminum because of the presence of residual sodium hydroxide in its composition.
For this experiment, we use a sheet of tinfoil, a portion of NaOH and water.
Wow! Oh my bicycle.
But it was not the NaOH reagent in the reaction of obtaining the soap. Why is he still in the soap?
Yes, you're right, but the reactions do not usually have 100% efficiency, so there may be waste of reagents in the product formed.
And how do we represent this experience? It has a chemical equation, right?
The main reaction that occurs is the sodium hydroxide reacts with aluminum in the presence of water to produce sodium aluminate and hydrogen gas.
This has more symbols, is quite different from those seen in soap manufacturing.
This number represents the two stoichiometric coefficient, ie the extent to which the substance reacts or is formed in a chemical reaction.
And that other "two" here? It's the same thing?
I know! This indicates the ratio of two numbers of hydrogen atoms for each oxygen molecule that comprises, is called the index!
The "s" in parentheses is that in this case, the substance is in solid form, but depending on the code, may represent other conditions.
The smaller symbols in parentheses are the representations of the physical and other conditions in which substances are the chemical equations.
O (s) indicates that the substance is in solid form; O (l) in liquid state, the (g) in a gaseous state;
o (v) indicates that the substance is in gaseous state, in the form of vapor and (q) is applied to substances or ions in aqueous solution.
This reaction can be represented in a more precise which is what happens to the species as found in the middle.
Look, when dissolving sodium hydroxide in water, it dissociates producing Na + and OH-. And so they meet in the middle.
These species represent the symbol (aq) suggests that they are dissolved in water.
Whipped!
Then there is another way of representing this equation of the reaction of sodium hydroxide with aluminum?
It yes, we can represent the substances that dissociate in ionic form, which is a more accurate representation of how they met in the middle.
How many new codes we heard today, huh?!
Are you sure you still want to learn photography?
Today we met some symbols and codes that are part of the language of chemistry.
And he learned an example of recycling used frying oil through a chemical reaction with sodium hydroxide, it is possible to make soap!
Remember, always keep your eyes open to what happens on your side, because "There is chemistry!"