2Content Theme of the project. Analysis of chemical bonding in common life stuff and human body.Why water is polar molecule?Survey on ‘like dissolve like’.Role as chemical analyst.Conclusion.
3Theme of ProjectWe are acting as scientists. We are finding out the real life chemistry of compounds on the basis of chemical bonding between them.By ‘ Sehrish Khan’
4Types of chemical bondings in daily life Table salt (NaCl), baking powder (NaHCO3)Ionic bondWater (H2O), sugar (C12H22O11), vinegar (CH3COOH), alcohol (C2H5OH), woodCovalent bondIce (H2O), DNAHydrogen bond
5Chemical Compounds in Human Body The composition can also be expressed in terms of chemicals, there exists different types of bonding in them. The chemical are such as:WaterProteins – including those of hair, connective tissue, etc.Fats (or lipids)Apatite in bonesCarbohydrates such as glycogen and glucoseDNADissolved inorganic ions such as sodium, potassium, chloride, bicarbonate, phosphateGases such as oxygen, carbon dioxide, nitrogen oxide, hydrogen, carbon monoxide. These may be dissolved or present in the gases in the lungs or intestines. Many other small molecules, such as amino acids, fatty acids
6Why Water is Polar? is a polar molecule A water molecule, a commonly-used example of polarity. The two charges are present with a negative charge in the middle (red shade), and a positive charge at the ends (blue shade).is a polar moleculea molecule of water is polar because of the unequal sharing of its electrons between hydrogen and oxygen in a "bent" structure.
7‘Like dissolves like’Two substances form a solutionwhen there is an attraction between the particles of the solute and solvent.when a polar solvent such as water dissolves polar solutes such as sugar, and ionic solutes such as NaCl.when a nonpolar solvent such as hexane (C6H14) dissolves nonpolar solutes such as oil or grease.Water is also a good solvent due to its polarity. The solvent properties of water are vital in biology, because many biochemical reactions take place only within aqueous solutions
9Role As Chemical analyst: Activity: painting classroom wall with oil paints.Step 1: first of all we selected oil paint colours to use it.Step 2: we came to know that the paint had gone thicker due to some environmental conditions.Step 3: we tried to figure it out and wanted to use thinner to make it less viscous.Step 4: we used water as a thinner.Step5: when we tried to mix oil paints and water, they didn't intermix with each other.Step 6: we all team members were wondering what might have gone wrong?
10Step 7: one of the team members wanted us to study the chemical nature of water. We found out that water is polar in nature but oil paints are non-polar. That is the reason we can not mix a polar compound into a non-polar compound.Step 8: soon we succeeded to select a non-polar compound as a thinner.Step 9: we used turpentine and varnish may be added to increase the glossiness.Step 10: the oil paint was thinned with the help of turpentine.
11Results and Drawbacks: Solvent (non-polar)Solute (non-polar)Turpentine, acetone, white spirit, naphtha, tolueneOil paintsWater can't be used as a thinner while using oil paints. We always make use of non-polar organic thinners for this purpose. As we know that 'like dissolve like' .
12Internet toolsWe created wiki and blog to share our ideas. The links are as follows:
13Other activitiesWe also created a brochure in which we included the components causing water pollution n arranged a walk to create awareness among the masses.
14Conclusion Disadvantage: Some paint thinners, such as mineral turpentine, may be abused as inhalants. This is an extremely dangerous and potentially addictive form of drug abuse. Due to the dangers linked with inhaling these solvents, most paint thinners are recommended for use in well ventilated areas to minimize danger.Thinners such as turpentine and white spirit are flammable.