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Mendeleev arranged the elements in the Periodic Table in order of increasing atomic number in horizontal rows so that elements with similar properties recur periodically (another words they fall directly beneath each other in the Table). The elements in a given vertical column are referred to as a family or group. The physical and chemical properties of the elements in a given family change gradually as one goes from one element in the column to the next. By observing the trends in properties, the elements can be arranged in the order in which they appear in the Periodic Table.

Procedure

I. activity series

Part 1: reactions of metals with water

CAUTION: Sodium and potassium react very rapidly with water to evolve hydrogen and heat. This is potentially dangerous because of the possibility of the violent explosive reaction of H 2 (g) with O 2 (g) present in the air. Both sodium and potassium cause severe chemical burns when it comes into contact with the skin.

CAUTION: H 2 is flammable.

Demo : The reactions of sodium and potassium with water will be demonstrated for you. Observe the rate of evolution of H 2 gas as a tiny piece of sodium or potassium is placed in a 500-mL beaker full of deionized water. Record your observations on your report form and write a balanced equation for these reactions.

  1.  Place 5 mL H 2 O (cold water should be used for Cu, Zn and Ca and warm water should be used with Mg) in each of four clean test tubes and place them in a test tube rack. Label them as follows:
A. Mg
B. Cu
C. Zn
D. Ca
  1. Place several small pieces of Mg, Cu, and Zn in the correctly labeled test tube prepared above. Place two or three pieces of Ca turnings in the test tube labeled "Ca".
  2. Watch for evidence of reaction by noting evolution of gas bubbles and any change in the color or size of the metal. Be patient, some reactions may be slow! Record your observations and write net ionic equations for each reaction.
  3. Discard the Ca and water in the Ca recovery beaker . Decant the water out of the test tubes containing Mg, Cu, and Zn and leave the pieces of metal that remain unreacted in each test tube.

Note: Trapped air bubbles on the metal surfaces are not indicative of a reaction.

Note: Net ionic equations must balance in mass (atoms) and in total charge on each side of the equation.

Part 2: reactions of metals with hcl

Caution: this part of the procedure must be done in a fume hood!!

CAUTION: Some of the test tubes may become very hot. Leave them in the test-tube rack while you are making observations.

  1. Place the three remaining test tubes in a test tube rack. There should be only three test tubes remaining.
  2. Add 2 mL of 3 M HCl solution to each test tube.
  3. Observe the relative rate of H­ 2 gas evolution for up to 5 minutes and record your observations on your report form.
  4. Based on the observations in the previous steps, list the elements that react in 3M HCl in order of increasing strength as reducing agents and write net ionic equations for all reactions.

Part 3: reactions of metals with other metal ions  

Note: it would be helpful to draw a diagram to remember where the drops are on the sheet of metal before you begin.

Abdc

  1. Place a clean 1 inch-square of metal foil (sheet) of each of these metals Cu, Zn and Pb on a flat surface.
  2. Clean one side of the metal surface by sanding it with fine sandpaper or steel wool.
  3. Place one or two drops in spots of each of these solutions in a clockwise order on the metal surfaces:
A. 0.5 M Ag +
B. 0.5 M Cu 2+
C. 0.5 M Zn 2+
D. 0.5 M Pb 2+

  NOTE: Do not test a metal with a solution of the same metal ion, such as Cu metal with Cu 2+ ion.

  1. Watch for color changes in each spot as evidence of reaction. If you are not sure whether the reaction has occurred, rinse the plate with water. A distinct spot of a different color on the surface is good evidence for the reaction.
  2. Write net ionic equations for each reaction. Arrange Ag, Cu, Pb and Zn in order of their increasing strength as reducing agents. If a metal A reacts with a cation of another metal B , metal A is a stronger reducing agent, more reactive than metal B .
  3. Rinse and dry each square of metal and return it to the correct beaker on the reagent shelf for other students to use.

Part 4: flame tests

This station will be located inside a fume hood

Chemicals/Materials:

  • 0.5 M Solutions of dissolved chloride salts of: Li, Na, K, Rb, Cs, Ca, Ba, Cu, Pb, Fe(II), and Fe(III), Sr (nitrate salt)
  • Wooden splints, one per each solution
  • Bunsen burner/clicker
  • 1M HCl
  • For each solution, take the splint out of the beaker and pass is through the flame of the Bunsen burner, remembering that the hottest part of the flame is the blue section in the center. Do not leave the splint in the flame too long as it will eventually catch on fire.
  • Replace the splint in the same beaker from which it came.
  • On your report form, record the color of the flame of each metal.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Gen chem lab. OpenStax CNX. Oct 12, 2009 Download for free at http://cnx.org/content/col10452/1.51
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