Chemical Periodicity

Topics: Chemistry, Periodic table, Chemical element Pages: 3 (551 words) Published: August 12, 2013
Chemical Periodicity

Jansen T. Rementilla
Christiane Marie Y. Reyes

De La Salle University-Dasmariñas
Dasmariñas City, Cavite, Philippines

ABSTRACT

The Copper Reaction experiment was conducted using 16M HNO3, distilled water, 6M NaOH, 6M H2SO4, acetone, zinc metal and methanol which were added in to the beaker with small pieces of copper wire. This was conducted to see and observe how the copper reacts with the different reagents. Different methods of separation like filtration, extraction and decantation were also used to conduct the experiment. While these reagents were being added, different results and reactions were observed until we get the recovered copper and weigh its mass to get the percentage yield. The calculation of percentage yield is:

Percentage yield = mass of the copper recovered (actual yield) / mass of copper wire (theoretical yield) x 100

INTRODUCTION

The variations in properties of chemical elements as depicted by their position in the periodic table is called the chemical periodicity. Elements on the same group exerts similar physical and chemical properties. One of the proofs of this statement is the similarity of the characteristics of elements Lithium, Potassium and Sodium which is the capability to react and are metals while Chlorine, Bromine and Iodine are all unreactive nonmetals. These are mostly bases on the valence electrons the elements have. This is because valence electrons are the electrons used in electron bonding. The following experiment will support the given proof.

MATERIALS AND METHOD

In this experiment, the method to be followed is divided into three groups having different instructions. For the first group from IA and IIA elements, place Li2CO3, Na2CO3, K2CO3, MgCO3, CaCO3 and BaCO3 in different test tubes and observe their physical state, color, appearance and also their solubility with 10mL of water. For some groups of IVA elements, place each sample of C, Sn, Si, and...

References: Samonte, J. L. & Figueroa, L. V. 2007. General Chemistry Laboratory Manual. 3rd edition. Philippines: C & E Publishing
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