Acid-Base Calculations The Ion-Product Constant for Water‚ Kw Water undergoes ionization to a small extent: H20(l) H+(aq) + OH–(aq) The equilibrium constant for the reaction is the ion-product constant for water Kw: (1) This is a key equation in acid-base chemistry. Note that the product of [H+] and [OH–] is a constant at a given temperature (Eq(1) value is for 25oC). Thus as the hydrogen ion concentration of a solution increases‚ the hydroxide ion concentration decreases
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Electrophoresis of Amino Acids Introduction: Electrophoresis is a separation technique based on the movement of charged ions under the influence of an electrical field. This technique is primarily used for the separation of amino acids and peptides on the basis of their charge. All amino acids contain ionizable groups that cause the amino acids‚ in solution‚ to act as charged polyelectrolytes that can migrate in an electric field. The amino acids with a net positive charge will migrate toward
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Depression in Men Fred S. Ward Abnormal Psychology Section 002 Spring 2013 Introduction The expression of depression in men can be very complex. There can be additional problems with measuring depression in men than with women. Men use various ways to hide and suppress their depression. Depression in men can be hidden in their being antisocial and participating in risk taking behaviors. Such behaviors can be drug and alcohol abuse‚ suicide‚ road rage‚ extra sexual activities or adventures
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experience loss‚ or who have attentional‚ learning‚ conduct or anxiety disorders are at a higher risk for depression. Depression also tends to run in families. The behavior of depressed children and teenagers may differ from the behavior of depressed adults. Child and adolescent psychiatrists advise parents to be aware of signs of depression in their youngsters. If one or more of these signs of depression persist‚ parents should seek help: Frequent sadness‚ tearfulness‚ crying Hopelessness
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Depression is a state of low mood and hatred to activity that can have negative effects on an individual’s behavior‚ feelings‚ thoughts‚ view of the world‚ and physical status. Most people feel anxious or depressed at times. Losing a loved one‚ getting fired from a job‚ going through a divorce‚ and other difficult situations can lead a person to feel sad‚ lonely‚ scared‚ nervous‚ or anxious. These feelings are normal reactions to life’s stressors. But some people experience these feelings daily
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people would probably say menopause or bottles of wine. But does the word depression ever come to mind? High depression rates in women aged 45 to 55 has remained steady for years. Why is this? It may be because depression and menopause share a common link. Depression‚ according to the American Psychiatric Association‚ is a “serious medical illness that negatively affects how you feel‚ the way you think‚ and how you act.” Depression is a result of changes in your brain’s chemical makeup. Other factors
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Experiment Acids‚ Bases‚ and Neutrals Problem Are common house-hold products pH balanced and neutral? Information Gathered pH measures how acidic or alkaline a solution is. The pH scale ranges from 0-14. Solutions that range from 0-6 are considered to be acidic. Solutions that are on the acidic end of the scale are low in pH‚ high in hydrogen ion‚ and low in hydroxyl ions. An acid has a sour taste‚ hence‚ will react to metal and will be corrosive; therefore‚ they are considered as an electrolyte
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9.1 Sulphuric Acid Sulphuric Acid is Manufactured in Industry 1. Sulphuric acid‚ H2SO4 is manufactured in industry through Contact Process. 2. The raw materials used are sulphur‚ air and water 3. The Contact process consists of three stages. Stage 1: The production of sulphur dioxide This can be obtained by two methods: 1. Burning of sulphur in dry air in the furnace S + O SO2 2. Burning of metal sulphide such as zinc sulphide or iron(III) sulphide in dry air. 2ZnS
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to practice common organic laboratory techniques inside the lab to get one oriented to the basic methods of procedure that can be used for later experiments. This experiment involves the separation of benzoic acid from a more crude form‚ consisting of benzoic acid‚ methyl orange‚ a common acid/base indicator‚ and cellulose‚ a natural polymer of glucose (Huston‚ and Liu 17-24). The technique that is used to perform this separation is called extraction. Extraction is a systematic process of separating
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result of the current economic situation a recession or a depression? In the economical aspect‚ depressions and recessions have a lot of similarities. Almost all the people heard about depressions and recessions in the economy since decade ago. However‚ not everyone can precisely distinguish the definition between depressions and recessions in the economy. The issue worth mentioning is that whether economic recessions or economic depression‚ all represent the same meaning. The reason why some people
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