CHEMISTRY ASSIGNMENT HELP
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Chemistry is the study of change, include universal changes like colors, minerals, elements
chemistry applies many different aspects of physics to a molecular level. In its most basic sense, chemistry studies atoms, the interactions between them, and what they make up. This requires a lot of physics – from electromagnetism to heat, many topics within chemistry actually stem from theories in physics.
what we study can be separated into 4 big areas (each with a lot of fields).
1 – Inorganic Chemistry
Where we can learn about atoms and how happens chemical interactions between they, and things like that
2 – Organic Chemistry
Where we can learn about carbon, mechanisms of ligation with carbon, a lot of substances with carbon, a lot of organic functions made of carbon, (seems like funny, but it’s true, we just study all aspects of carbon)
3 – Analytical Chemistry
Where we learn about techniques and instrumental techniques of analyzes a chemical substance
4 – Physical – Chemistry
Where we study the physical properties and the physical laws that govern the chemical world
Topics Covered in Chemistry Assignment
These are crystals of infinite cations and anions bound together. Ionic compounds are made up of molecules as well. Ionic compounds have all the characteristics of a compound. The bond that holds the atoms together in it is ionic bond; an electrostatic force of attraction.
Ionic compounds have 2 or more ions joined together by means of the ionic bond into molecules. And the ions in an ionic compound most certainly can not be separated by physical means. Take the example of one of the most common ionic compounds, common salt, i.e, sodium chloride (NaCl). One Sodium cation and one Chloride anion bound together by a strong electrostatic force of attraction make up a molecule of sodium chloride.
A redox (short for reduction – oxidation) reaction is one where the oxidation states of reactants involved in the reaction, are changed (and electrons transferred). If reactants have their oxidation number increased and lose electrons, then they’re said to be oxidised, whilst those that gain electrons and lower their oxidation number are said to be reduced. One example is that between sodium sulphite & potassium permanganate:
2 KMnO4 + 3 Na2SO3 + H2O → 2 MnO2 + 3 Na2SO4 +2 KOH
The sulphite ions are oxidised to sulphate ions, whilst the permanganate ion is reduced to manganese dioxide.
Transition Metal Chemistry
When transition metals form compounds, the d orbitals split and there is a small energy difference between the two sets of d orbitals. This small energy difference corresponds to visible light. Depending on the strength of the ligand, the energy difference and the splitting can change.
Thermochemistry is a branch of thermodynamics which is the study of heat given off or absorbed in a chemical reaction.
Balancing Chemical Reactions
The most important thing for balancing chemical reactions is for the Conservation of Mass, because mass can neither be created nor be destroyed (not in the case of Nuclear Reactions where Einstein’s Mass-Energy Equivalence comes into action).
Balancing Chemical equations gives us an idea about the quantity of chemical reactions that are needed for the reaction.
Without balancing we just know what kind of products are obtained but with balancing chemical reactions we can also know the weight of substance produced.
Getting more advanced,we can also know the entropy changes in the reaction in turn the thermodynamic factors like Gibbs Energy and so on.
But in a simpler level, balancing chemical reactions helps us to know the quantity of reactants required and quantity of the products obtained.
The mole unit is basically the number of atoms or molecules. It is the most important thing to understand in stoichiometry and, ultimately, chemistry as a whole.
There is a constant rule that 1 mole of any type of particle always contains 6.02×1023 particles. Both elemental atoms and molecules follow this rule, from elemental hydrogen (H) to oganesson (Og); from simple hydrogen gas (H2) to the ever-so-complex botulinum toxin.
There are two things called atomic mass and molecular mass. Atomic mass is the mass of an element type in 1 mole of that element. Molecular mass is the mass of a molecule type in 1 mole of that molecule.
The concept of the mole is very important in chemistry. It is extremely vital in chemical reactions, which is basically what chemists deal with pretty much every time.
This is the shortest explanation :-
mole is a unit.
Its value is 6.023 x 10^23 (Avogadro constant)particles.
Number of moles in a given mass of a substance= Given mass/Atomic mass
Atomic mass = number of protons + number of electrons
To find the number of particles in 1 mole=Number of moles/Avogadroconstant
Acid And Bases
It’s depends on the PH value.
Acids are ionic compounds that break apart in water to form a hydrogen ion (H+). Ionic compounds are a compound with a positive or negative charge.
In chemistry, a base is a substance that in aqueous solution is slippery to touch, that’s bitter, changed the color of the indicator, (turns red litmus to blue) react with acid to form salts.
Structure Of The Atom
An Atom is made up of 3 particles.
They are :
Proton :- These are positively charged particles and these occur within the Atomic Nuclei. these are smaller in mass when compared with Neutrons.
Neutrons :- These occur in the Atom. Neutrons are the particles with a neutral charge.These have the greatest mass but no charge.
Electrons :- Electrons revolve around the Nucleus in energy level. There are very small when compared with both protons and Neutrons. These have a relative mass of 0.0005439.
The number of Protons and Neutrons present in Nucleus are called Nucleons.
Then the total number of Nucleons are Known as Mass Number. The number of Protons occurs in the Nucleus are called Atomic Number.
The study of the chemistry of carbon is to be known as Organic Chemistry. Carbon is unique in its ability to bond with itself in an almost infinite number of different ways. The number of potential carbon compounds is greater than all of the potential compounds that can be formed from combining all other elements on the periodic table. For this reason, it gets an entire field dedicated to it. All of the other elements are lumped into inorganic chemistry. The importance of organic chemistry is emphasized by its role in biology.
Nomenclature in Chemistry is the process of naming the elements based on careful analysis and interpretations by the International Union of Pure and Applied Chemistry. (IUPAC).
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