Chemistry

Mixtures: Characteristics of Mixtures

len Alfred Ajibola - Sat, 15th February, 2020 @ 19:29

Topics in Chemistry

Chemistry 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

Please check out our Test Your Knowledge page to see all Questions and Answers

The Separating Funnel is a technique used in the separation of mixtures. Another name for Separating Funnel is the _____ Funnel.

  • A. Partition
  • B. Separatory
  • C. Division
  • D. Liquid
  • E. Half
  • F. Dividing

2NH4+(aq) + Ag+(aq) -> 2H4AgN

The equation above represents _____ acid.

  • A. Svante Arrhenius'

  • B. Brønsted–Lowry's

  • C. Gilbert Lewis'

  • D. Avogadro's

  • 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?

  • A. A new thing is formed
  • B. It cannot be easily separated into it's constituents elements
  • C. A new chemical formula accompanies whatever is formed
  • D. The burning of candle is an example of a chemical change
  • E. Blood is an example of a chemical change
  • F. Iron rust is an example of a chemical change

Which of the following statement is FALSE concerning a physical change _____.

  • A. Substances formed in a physical change have a unique chemical formula and IUPAC name
  • B. It's a change that is easily reversible
  • C. It's a change that can be separated via an appropriate separation technique
  • D. No new substance is formed
  • E. A mixture of salt and water is a physical change
  • F. Physical change can result to a change in color and shapes of substances

The following substances will sublime EXCEPT _____.

  • A. Sodium Cryolite
  • B. Solid Carbon(IV)oxide
  • C. Arsenic
  • D. Sulphur
  • E. Iodine Crystals
  • F. Naphthalene

Which of the following is a state of matter?

  • A. Ions
  • B. Plasma
  • C. Compounds
  • D. Molecules
  • E. Atoms
  • F. None of the above

The ideal way of separating a mixture of blood is through _____.

  • A. Chromatography
  • B. Fractional Distillation
  • C. Centrifugation
  • D. Filtration
  • E. Separating Funnel
  • F. Fractional Crystallization

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What is a Mixture?

A mixture is formed from the combination of two or more elements physically combined. Due to its nature of combination, the change associated with a mixture is termed a physical change.

Please read on Physical and Chemical Changes here.

Whatever is formed in a mixture do not have an ideal chemical formula.

You can read on Compounds in Chemistry and their Characteristics here.

Note: Whenever the term mixture is used on a substance, consider such substance to be easily reversible to whatever formed it. This is an attribute of a physical change.

Please read on the Physical Properties of Matter explained with examples here.


Characteristics of Mixtures

  1. The various substances that make up a mixture can be recovered through an appropriate separation technique.
    Please read on Separation of Mixtures in Chemistry here.
  2. Mixtures can be homogenous or heterogeneous.
    Please read on Homogenous and Heterogeneous Mixtures explained with examples here.
  3. A new substance is not formed in a mixture, hence whatever is formed has no IUPAC name or chemical name.
    Please read on the Chemical Properties of Matter here.
  4. The change that accompanies a mixture is only associated with the rearrangement of molecules while the internal composition of the substance remains the same.
    Please read on the Concept of Matter here.
  5. The change that accompanies a mixture can only be seen in the physical properties of the substance; for instance, color.
    Please read on Physical Properties of Metals here.
  6. A mixture is always reversible. This means that it can be separated to whatever formed it.
    You can read on Elements and their Characteristics here.
  7. Mixtures are not associated with their own chemical formulas.
    Please read on Emperical Formula explained with Worked Examples here.
  8. Whatever is formed in a mixture will have a variable composition. For instance, we can have a mixture of sand and stone in two separate containers. One of the containers may contain more proportion of stone while the other may contain more of sand. This imply that the ratio of combination in a mixture is variable. (That is; they don't have fixed ratio).
    You can read on Molecular Mass and Relative Molecular Mass here.
  9. The energy change associated in the formation of a mixture is insignificant or very little.

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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 7 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.


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Amazing facts in Chemistry

The only letters that failed to appear on the periodic table are letters:

J     &     Q

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 utilize 'copper' water bottles in schools

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