# 0.5 The best table in the world  (Page 3/3)

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## Part 3. reactions of metals with other metal ions

• Place a clean 1 inch-square of metal foil (sheet) of each of these metals Cu, Zn and Pb on a flat surface.
• Clean the metal surfaces by sanding them with fine sandpaper or steel wool.
• Place one or two drops in spots of each of these solutions in a clockwise order on the metal surfaces:
 A. 0.5 M ${\text{Ag}}^{+}$ B. 0.5 M ${\text{Cu}}^{2+}$ C. 0.5 M ${\text{Zn}}^{2+}$ D. 0.5 M ${\text{Pb}}^{2+}$
•  NOTE: Do not test a cation of a metal on a square of the same metal such as ${\text{Cu}}^{2+}$ ion and Cu metal.
• 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.
• 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.
• Rinse and dry each square of metal and return it to the correct beaker on the reagent shelf for other students to use.

## One station set up that all sections will rotate through

Clean a spatula wire by dipping it into dilute hydrochloric acid (3M) and then holding it in a hot Bunsen flame. Repeat this until the spatula doesn't produce any color in the flame.

When the spatula is clean, moisten it again with some of the acid and then dip it into a small amount of the solid you are testing so that some sticks to the spatula. Place the spatula back in the flame again.

If the flame color is weak, it is often worthwhile to dip the spatula back in the acid again and put it back into the flame as if you were cleaning it. You often get a very short but intense flash of color by doing that.

Chemicals/Materials:

• Chloride salts of Li, Na, K, Rb, Cs, Ca, Ba, Cu, Pb, Fe (II) and Fe(III) Sr (nitrate salt).
• Glass rods with loops of Pt wire.
• Bunsen burner/clicker.
• Concentrated nitric acid or hydrochloric acid.

It should be noted that sodium is present as an impurity in many if not most metal salts. Because sodium imparts an especially intense color to a flame, flashes of the sodium may be observed in nearly all solutions tested.

## Pre-lab 5: the best table in the world!

Hopefully here for the Pre-Lab

Name(Print then sign): __________________________________________________

Lab Day: ___________________Section: ________TA________________________

This assignment must be completed individually and turned in to your TA at the beginning of lab. You will not be allowed to begin the lab until you have completed this assignment.

• The mass of an atom of the element in atomic mass units (amu) for the molar mass of a mole ( $6\text{.}\text{02}×{\text{10}}^{\text{23}}$ ) of atoms in grams above or below the chemical symbol for each element? Circle the correct one.
• The second symbol listed for each element is the _______ __________, symbol ________? Fill in the blanks.
• The number in question 2 gives the number of
• ____________ or
• the number of ________________ for a neutral atom. Fill in the blanks
• The elements in a given vertical column are referred to as a _________ or __________. Fill in the blanks.
• The horizontal rows are called __________? Fill in the blank
• The block of elements between groups II and III are called ___________ _________? Fill in the blanks.
• Elements 58 to 71 are known as ____________ or __________________? Fill in the blanks.
• Elements 90 to 103 are known as _________ ____________? Fill in the blanks.
• Do elements with larger atomic numbers than 92 occur naturally? True or false? Circle the correct one.

## Report 5: the best table in the world!

Hopefully here for the Report Form

Note: In preparing this report you are free to use references and consult with others. However, you may not copy from other students’work (including your laboratory partner) or misrepresent your own data (see honor code).

Name(Print then sign): __________________________________________________

Lab Day: ___________________Section: ________TA________________________

## Part 1. reactions of metals with water

 Metal Observations Net Ionic Equations (If NoReaction Occurs, write N.R) Na K Mg Cu Zn Ca

## Part 2. reactions with hcl

 Metal Observations Net Ionic Equations (If No Reaction Occurs, Write N.R.) Mg Cu Zn

2. Based on your experimental results place Mg, Cu, Zn and Ca in order of increasing strength as reducing agents.

## Part 3. reactions with other metal ions

1. Write in the appropriate box either“REACTION”or“NO REACTION”.

 Zn Cu Pb ${\text{Ag}}^{+}$ ${\text{Cu}}^{2+}$ Do not test ${\text{Zn}}^{2+}$ Do not test ${\text{Pb}}^{2+}$ Do not test

2. Write balanced equations to represent the results tabulated above.

3. Based on your experimental results, arrange Ag, Cu, Zn and Pb in order of increasing strength as reducing agents.

4. Arrange ${\text{Ag}}^{+}$ , ${\text{Cu}}^{2+}$ , ${\text{Zn}}^{2+}$ and ${\text{Pb}}^{2+}$ in order of increasing strength as oxidizing agents.

5. Combine the results from Part 2 and Part 3. Arrange Mg, Cu, Zn, Ca, Ag and Pb in order or increasing strength as reducing agents.

6. Place Ni in this row, if it is found that Ni will deposit on Zn foil, but not on Pb foil when a drop of ${\text{NiSO}}_{4}$ is placed on both.

## Part 4. flame tests

 Element Color in flame Li Na K Rb Cs Ca Sr Ba Cu Pb

What are the limitations of this test?

Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
what does nano mean?
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
it is a goid question and i want to know the answer as well
Maciej
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
for screen printed electrodes ?
SUYASH
What is lattice structure?
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
how did you get the value of 2000N.What calculations are needed to arrive at it
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