Topics in ChemistryChemistry Scheme of Work, SS1, First Term Chemistry Scheme of Work, SS1, Second Term Chemistry Scheme of Work, SS1, Third Term Compounds in Chemistry: Characteristics of Compounds Types of Mixture: Homogenous and Heterogeneous Mixtures Mixtures: Characteristics of Mixtures Physical Properties of Matter explained with Examples Chemical Properties of Matter explained with Examples Differences between Physical and Chemical Change Ionic Theory and Electrolysis Physical and Chemical Properties of Acids States of Matter: Characteristics of Solids Liquid State of Matter: Characteristics of Liquids Gaseous State of Matter: Characteristics of Gases Molar Mass, Worked Examples and Differences with Molecular Mass Elements: Characteristics of Elements Salts and Types of Salt in Chemistry Mixtures and Separation of Mixtures Mixtures and Separation of Mixtures - part 2 Mixtures and Separation of Mixtures - part 3
Academic Questions in Chemistry
The Separating Funnel is a technique used in the separation of mixtures. Another name for Separating Funnel is the _____ Funnel
2NH4+(aq) + Ag+(aq) -> 2H4AgN
The equation above represents _____ acid.
A. Svante Arrhenius'
C. Gilbert Lewis'
E. Sir Isaac Newton's
F. Albert Einstein's
According to Brønsted Thomas Martin Lowry, an acid is defined as _____.
A. Any substance that produces hydrogen ion (H+) when dissolved in water
B. A substance that accepts electron pair in a chemical reaction
C. A substance that gives out hydronium ion (H3O+) when dissolved in water
D. A substance that donates a proton in a chemical reaction
E. A substance that reacts with a base to form salt and water
F. A substance whose hydrogen ions (H+) are displaced after a reaction with metals higher in the activity, reactivity or electrochemical series
Which of the following is NOT a characteristic of chemical change?
Which of the following statement is FALSE concerning a physical change _____.
The following substances will sublime EXCEPT _____.
Which of the following is a state of matter?
The ideal way of separating a mixture of blood is through _____.
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Liquids are one of the states of matter alongside solids, gases and plasma. The main difference between each of these states of matter emanates from the nature of their particles.
Think of a particle as the smallest part that makes up anything.
For instance, by grinding a sugar cube, we will expose each of it's constituent particles.
In another instance; whenever we cook (let's say a soup or stew), we will likely expose the particles of a maggi cube by grinding it before addition into our soup or stew. The reason why we do this is to separate and expose the constituent particles that make up the maggi cube so they can easily dissolve into our soup.
Regarding the above instances, if you can take out a single (smallest) particle from the grinded sugar, then, such sugar particle can be considered as an atom of the sugar.
Similarly, each of the (single) particle that dissolves into the soup make up the atoms of the maggi.
By definition, an atom is the smallest part (or particle) of a substance that can take part in a chemical reaction.
Note: Understanding the concept of matter, atoms and particles will prove useful regarding the states of matter.
The terms atom and particle will be used interchangeable in order to help you better understand liquids (as a state of matter).
Liquids have spaces between their atoms; thus its particles can exhibit some degree of movement.
The particles of a liquid are loosely packed together.
The image below shows the loosely arranged particles (atoms) in a liquids:
Structure of Liquid Particles in a Beaker
Spaces are present between the liquid particles because their atoms are held by a very weak force. These spaces are large enough to make the atoms move or flow. As a result, you can put you finger through a liquid and pull it out again.
Note: A liquid cannot be handed to another person without the help of a container, else, it pours off. This is so because their atoms are loosely packed together.
A liquid will therefore always assume the shape of it's container.
Even in lakes and rivers, the bank, river bed (or bottom) and the shore forms its container or boundary.
The density of liquids will also depend on the atoms they are composed of; for instance, 10kg of water will not weight the same as 10kg of red oil because their constituent atoms are different. (In the case of water, it's constituent atoms are hydrogen and oxygen respectively).
Note: The particles that make up a liquid can still be compressed such that they become more closer to themselves. The refrigerator is an example of a technology that compresses liquid particles. (This is how water is transformed into ice).
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Amazing facts in Chemistry
The only letters that failed to appear on the periodic table are letters:
Gold and copper are the only two non-silvery colored metals. Please read some interesting facts about gold here
Copper is the only metal that is naturally antibacterial. This is why you would see some children carry copper water bottles to school
Water actually freezes faster when it’s warm than when it’s cold
Most element in their pure state exists physically in different forms. For instance, pure carbon can exist as both diamond and graphite. This phenomenon is called allotropy.
Please read on modification of Dalton's atomic theory here.
If you pour a handful of salt into a full glass of water, the water level will go down rather than overflowing the glass.
Similarly, if you mix half liter of water and half litre of alcohol, the total volume of the liquid will be les than one litre
NOTABLE POINTS IN Chemistry