Genetics

Genetics

Chemistry Summative

Observation

Reactants:                            AgNO3  + K2CrO4  

The potassium chromate in it’s liquid is a yellow, translucent and soluble.

The silver nitrate in it’s liquid form is a clear and translucent.

Reaction:

The reaction happened instantly after a drop of silver nitrate was added into the potassium chromate . The silver nitrate turn into a brownish-red opaque solid inside the potassium.  

Product:                             

The silver chromate is brownish-red opaque solid

The potassium nitrate is clear and translucent liquid

 

After Reaction:

After 12 hours the silver chromate would sink to the bottom and the potassium nitrate would be at the top.

Conclusion and Analysis

Type of Change:

The chemical change

Balance Equation:

It is a double replacement reaction

AgNO3  + K2CrO4  ---> AgCrO4  +  K2NO3

- It is a mechanical mixture because we can clearly still see the brownish-red substance inside the clear translucent liquid

-It is a double replacement reaction because the potassium wants to lose an electron while the nitrate wants to gain an electron

Chemical Reaction Summative

               The elements included in this balanced chemical equation are carbon, hydrogen and oxygen. As shown in the picture down below, in the reactant there are 2 acetylene and five oxygen.In the product are four carbon dioxide and two water. Acetylene is a chemical compound of carbon and hydrogen.

                Law of conservation of matter states that matter cannot be created or destroyed. To satisfy this law, we have to balanced the chemical equation. In this chemical equation(2C₂H₂ + O_{2 ----->}  4CO₂ + H₂O), it satisfy the law as there are no new atoms that are added or destroyed, they are just moved. In this chemical equation the number of different atoms of elements in the reactants side are equal to the number of different atoms of elements in the product side.

                Acetylene is a colorless and odorless gas used as a fuel and a chemical building block. Molecule weight of acetylene is 26.04 lb/mol. Boiling point is at -119.6 degree Fahrenheit, melting point at -113.4 degree Fahrenheit. Liquid density of acetylene is 23.61 lb/ft3 at 70 degree Fahrenheit, gas density is 0.0677 lb/ft3 at 70 degree Fahrenheit. These are the physical properties of acetylene. Acetylene decompose very slowly at a normal temperature but decompose rapidly 780 degree Celsius. The amount of carbon to hydrogen is so large that this hydrocarbon behaves as a feeble acid. But it is not sufficiently ionized in aqueous solution to show an acid reaction. These are the chemical property of acetylene.

Lithium Hydroxide Chemical Reaction

Chemical Reaction

Lithium hydroxide is a compound with a formula of LioH, but as lithium oxide mix with water, it make Lithium hydroxide. The balanced formula for this reaction is Li2O + H2O ---> 2 LiOH. For a chemical equation to be balanced, there needs to be equal numbers of atoms on both sides of the equation.Chemical equations need to be balance in order to satisfy the law of conservation of matter. In the reactants which is lithium oxide and water, there are 2 lithium atoms, 2 oxygen atoms and 2 hydrogen atoms so the product need 2 LiOH molecules (2 lithium hydroxide) to balance the equation. The law of conservation of matter states that the mass can neither be destroyed or created. The chemical change happens when lithium oxide( Li2O) is mixed with water which make Lithium hydroxide(LiOH). The physical change is that lithium oxide looks a white solid,  but turns into a colorless solution of lithium hydroxide which is odorless and also looks like white solid but it is hygroscopic, meaning it absorbs moisture from air.

Making Molecules

Click here to read more about molecules( especially caffeine and water)!

Properties of Matter

Rigid(Stiff):  difficult to bend 

Strength: the amount of weight that can be supported 

Brittle: breaks easily when bent or dropped  

Elastic: will return to its original shape after stretching 

Malleability: easy to change shape

Mass: the heaviness of the matter 

Soluble: the particles will spread out in water and appears to disappear

Odor: Smell 

State: is it a solid. liquid or a gas

Ductlility:easy to  change shape

Volume: how much space the matter takes up

Density: how tightly or loosely packed the particles are

Luster: has a shine or glow 

Hardness: ability to stretch 

Pluto