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Acids and alkalis
Acid base chemistry practical
Acid base reaction
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INTRODUCTION OF ACID BASE REACTION
Acids and bases play a essential role in chemistry because, with the exclusion of redox reactions, each chemical reaction can be categorized as an acid-base reaction.
Practical use of acid base chemistry
Acid-base chemistry is central to us on a practical level as well, outside of laboratory chemical reactions. Our bodily functions, going from the microscopic transport of ions through nerve cell membranes to the macroscopic acidic digestion of food in the stomach, are all lined by the principles of acid-base chemistry. Homeostasis, the temperature and chemical equilibriums in our bodies, is preserved by acid-base reactions. For example, fluctuations in the pH, or concentration of hydrogen ions, of our blood
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Lavoisier made-up that all acids must comprise oxygen, and this idea was combined in the names used for this element in the various languages; the English oxygen, from the Greek oxys (sour) and genna (production); the German Sauerstoff, literally acid material; and the Russian kislorod, from kislota (acid). Succeeding the discovery that hydrochloric acid confined no oxygen, Sir Humphry Davy about 1815 first known that the key element in acids was hydrogen. Not all substances that hold hydrogen, however, are acids, and the first really reasonable definition of an acid was given by Justus von Liebig of Germany in 1838. According to Liebig, an acid is a compound having hydrogen in a form in which it can be replaced by a metal. This definition held the field for about 50 years and is still deliberated essentially correct, though somewhat outmoded. At the time of Liebig’s proposal, bases were still stared solely as substances that neutralized acids with the production of salts, and nothing was known about the constitutional features of bases that enabled them to do …show more content…
Mixing acids and bases can cancel out or neutralize their thrilling effects. A substance that is neither acidic nor basic is neutral.
The pH scale processes how acidic or basic a substance is. The pH scale series from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic.
The pH scale is logarithmic and as a result, each whole pH value below 7 is ten times more acidic than the next higher value. For example, pH 4 is ten times more acidic than pH 5 and 100 times (10 times 10) more acidic than pH 6. The same grasps true for pH values above 7, each of which is ten times more alkaline (another way to say basic) than the next lower whole value. For example, pH 10 is ten times more alkaline than pH 9 and 100 times (10 times 10) more alkaline than pH 8. PH SCALE
The pH scale is used to overgrown solutions in terms of acidity or basicity (alkalinity). Since the scale is depends on pH values, it is logarithmic, meaning that a change of 1 pH unit resembles to a ten-fold change in H+^+ start superscript, plus, end superscript ion concentration. The pH scale is often said to range from 0 to 14, and most solutions do fall within this range, while it’s possible to get a pH below 0 or above 14. Anything below 7.0 is acidic, and anything above 7.0 is alkaline, or
== == = == 1. The pH meter is calibrated, using a buffer solution of accurately known pH. 2.
In the pH homeostasis lab, 6 experiments were conducted. The hypotheses were: If base is added to water then the pH will increase; If acid is added to water then the pH will decrease; If base is added to homogenate, then the pH will increase; If acid is added to homogenate, then the pH will decrease; If acid or base is added to buffer, then the pH will remain the same. After the experiments were conducted, the graphs were somewhat similar to the hypotheses.
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.
I decided to experiment with pHs within the range pH 2 to pH7, as I
strong acid or base does not necessarily yield a drastic jump in pH. The acid
As 10 mL of NaOH was added drop wise, the solution began to have a pink tint. The fuchsia color did not permanently stay until 9mL of NaOH was added. The pH indicator demonstrated when exactly the reaction has neutralized. Because an acid and a base reacted to form water and a salt, the reaction is a neutralization
Some improvements to the experiment might be using Na Acetate or Na Citrate as buffers instead of KHPO4. The pH ranges are 4.5-5.5 and 4.7-5.5, respectively. This range falls closer to the ideal pH of 5, then KHPO4 (pH
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.
The equivalence point is halfway up the steep curve and for a weak acid- weak base titration, the pH is NOT neutral at the equivalence point, but approximately 8.
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.
Alkaline water is water that’s less acidic than your regular tap water. That generally means the water it is rich in alkalizing compounds such as calcium, silica, potassium, magnesium, and bicarbonate according to Ryan Adams for Precision Nutrition.
The human body goes through many different reactions and processes that are necessary for humans to live. Chemical reactions by the human body are never seen with the human eye, but it is so vital that these processes are understood. Without this understanding, diseases and disorders can never be resolved or controlled. These processes may be small in size, but have a great deal of impact on the function of the human body.
If the pH in the urine is examined to be at 7, then the pH will be in a normal chemical reaction.
One of the most prominent responsibilities of biochemists is studying the chemical makeup of living things (13). They look at and study food, drug, tissue, air, water, plant, animal, and cell samples (“Biochemist” 14; “Biologists”). If the individual is a research biochemist, her job is only to write down the information they find and move on. Applied biochemists use their research to solve real life problems. They can use complex lab equipment to run experiments, and it is even plausible that they might design their own experiments (“Biologists”; “Biochemists” 16).