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Chemistry lesson 11 acids and bases
Physical Science Acids and base
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Part A: Background information:
Acids and bases are currently used in many various ways in our society and it is very important in daily uses. To many industries, acids and bases are a common factor as it is used to make fertilizer, cleaning supplies, or even sources of food or medicines to provide an easy life style. Acid is a substance with particular chemical properties, acids reacts with certain metals to produce hydrogen gas, acids also reacts with carbonate and bicarbonates to produce carbon dioxide gas, it has a sour taste. Some properties of acids are, it produces H+ (as H3O+) ions in water (the hydronium ion is a hydrogen ion attached to a water molecule), Reacts with bases to form salt and water, turns blue litmus paper to red it has a pH range of between 1 and 6. According to Bronsted-Lowry theory the acids form a conjugate base after donating a proton. Base is a substance with particular chemical properties; it produces OH- ions in water, its aqueous (water) solutions conduct and are electrolytes. It turns red litmus paper to blue. Reacts with acids to form salt and water, it has pH rage of between 8 and 14. According to Bronsted-Lowry theory the base forms a conjugate acid when it receives a proton. Considering the pH scale shows how strong or weak an acid or a base is. Acids and bases can be called strong acids and strong bases when they are completely ionized when dissolved in water. Strong acids react completely with water to produce hydrogen ions H+.
For example: when looking at hydrochloric acid which is a strong acid it is combined with Hydrogen and Chlorine forming its product:
HCI H+ + CI-
Hydrochloric acid Hydrogen + Chlorine
The ions ...
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...acid, the production of phosphate fertilizer is more environmentally friendly than the productions of drugs. Adding more sulphuric acid in medications and drugs can lead to many diseases whereas by producing fertilizers using sulphuric acid can lead to a healthy life style.
Part F: References:
Lawrence, L 2004, ‘Acids and Bases’, National Laboratory, http://www.ehow.com/about_6460548_do-bases-affect-daily-lives_.html?ref=Track2&utm_source=ask
Marie, A. (2009, January 1). Acids and bases. . Retrieved , from http://chemistry.about.com/od/acidsbases/a/acidsbasesterms.htm
Calculating pH scale. (2006, January 1). . Retrieved , from http://www.chem.purdue.edu/gchelp/howtosolveit/Equilibrium/Calculating_pHandpOH.htm
clark, j. (2002, January 1). strong and weak bases. . Retrieved , from http://www.chemguide.co.uk/physical/acidbaseeqia/bases.html
Most substances fall on a scale ranging from the most acidic to the the most basic with neutral substances falling somewhere in the middle. Scientists call this the pH scale. pH levels are measured in numbers,0 to 14. The closer a substance is to zero the more acidic it would be. The closer to 14 the more basic a substance would be.Now what defines an acid and a base, one might ask? There are three ways of defining acids, each singling out a specific property. The first theory is the Arrhenius Theory with states, that an acid is a substance that produces the ion H+ when in a water solution, while a base is a substance which produces the ion OH- when in a water solution. Examples of an Arrhenius acid are HCl and HNO3. Examples of an Arrhenius base are NaOH and AlOH3.
Brønsted and Lowry’s concept of acids and bases detail that these reactions are basically proton transfer reactions. Acids act as proton donors, meaning that they give away a hydrogen ion. While bases act as a proton acceptors, entailing that they receive a hydrogen ion. During reactions between acids and bases, acids are paired with hydrogen, while bases are paired with a hydroxide group. When these two react in an aqueous solution and a salt is produced, that lacks both acidic and basic properties, and water is produced. Then neutralization has occurred. Neutralization occurs when a strong acid and a strong base react, because they completely dissociate in water.
We have to emphasize the importance of memorizing certain names and formulas and some prefixes and suffixes that are used in building a system of nomenclature. From there on, it is a matter of applying the system to different names and formulas you meet. The summary all the ideas that will be presented in this essay help you to learn the nomenclature system.
Bibliography "Sodium Bicarbonate" American Heritage Dictionary and Electronic Thesaurus (1985) 21: 347 "Acids and Bases" Science Activities Winter 95, Vol. 31 issue 4, p28. McCarthy, E. Jerome Basic Chemistry Homewood Illinois: Irwin-Dorsey, 1968.
Acid-Base Titration I. Abstract The purpose of the laboratory experiment was to determine equivalence. points, pKa, and pKb points for a strong acid, HCl, titrated with a. strong base, NaOH using a drop by drop approach in order to determine. completely accurate data. The data for this laboratory experiment is as follows.
CaCl2 + H2O + CO2
strong acid or base does not necessarily yield a drastic jump in pH. The acid
Acid rain has been proven to have damage forests, fresh waters and soils, killing insect and aquatic life-forms. It also causes damage to buildings and impacts on human health. Many people do not know what acid rain actually is. Acid rain is any form of precipitation that is unusually acidic, low pH levels, higher than normal amounts of sulfuric and nitric acid, occurs naturally and from man made sources. Forms when gases react in the atmosphere with water, oxygen, and other chemicals (what is acid rain?). The only water that will not have some amount of acidity is pure water. Pure water has a pH of 7 which is neutral; regular, unpolluted rain water has a pH of around 5.6. The acidity in rain water comes from the presence of Carbon Dioxide, Nitrogen Oxide, and Sulfur Dioxide. CO2 reacts with water to form carbonic acid. Nitrogen and water react during lightning storms, forming Nitric Oxide. NO is then oxidized to form N02. The NO2 reacts with water to form nitric acid. Due to this, the pH is lowered to be slightly acidic (Acid Rain). Acid rain can occur naturally in the environment, but the problem occurs when human interaction is the cause of the acidic levels.
s) (aq) (aq) (g) Magnesium will react with hydrochloric acid, because it is higher in. the reactivity series of hydrogen. When the two chemicals react a displacement reaction will take place and the magnesium will displace. the hydrogen in the hydrochloric acid forming magnesium chloride and hydrogen gas. Reactivity Series K (potassium)
The simplest experiment for this type of situation would be to use red and blue litmus paper to distinguish between acids, bases and salts. Hydrochloric acid (HCl) makes blue litmus paper change color going from blue to red, making it an acid. Sodium hydroxide (NaOH) makes red litmus paper change color going from red to blue, making it a base. Sodium chloride solution (NaCl) is neutral, since it would only soak blue and red litmus paper, considering that it is a by product of when an acid and a base mix together, neutralizing each other.
Hydrochloric acid is a strong and corrosive acid that is often used as a reagent in laboratories.
Chemical: Acids in foods and beverages such as citrus fruits, spices, wines and carbonated beverages; acids produced by acidogenic bacteria following carbohydrate exposure; acids from gastric regulation. (Wilkins, BS, RDH, DMD, 2013)
Acid-Base balance is the state of equilibrium between proton donors and proton acceptors in the buffering system of the blood that is maintained at approximately pH 7.35 to 7.45 under normal conditions in arterial blood. It is important to regulate chemical balance or homeostasis of body fluids. Acidity or alkalinity has to be regulated. An acid is a substance that lets out hydrogen ions in solution. Strong acid like hydrochloric acid release all or nearly all their hydrogen ions and weak acids like carbonic acid release some hydrogen ions.
An alkali is a soluble base and forms hydroxyl ions (OH-) when placed in water. It can be called a proton acceptor and will accept hydrogen ions to form H2O. An example of an alkali is Sodium Hydroxide (NaOH). Neutralization Reaction:- [IMAGE]Acid + Alkali Salt + Water [IMAGE]Hydrochloric acid + Sodium Hydroxide Sodium Chloride + Water [IMAGE]HCl(aq) + NaOH(aq) NaCl(aq) + H2O(l) [IMAGE]H+ (aq) +
Hydrochloric Acid, Sodium Thiosulphate Reaction. Research: What is the difference between Hydrochloric acid is a strong colourless acid formed when hydrogen chloride gas dissociates in water, used in industrial and laboratory. processes. The.