CHEMISTRY DETERMINATION OF ENTHALPY CHANGE OF NEUTRALIZATION IA Criteria Assessed: DCP CE MS Introduction When an alkali neutralizes an acid‚ a salt and water are formed. Aqueous hydrogen ions (H+(aq)) from the acid react with the hydroxide ions (OH- (aq)) from alkali‚ forming water. The identity of salt will depend on the nature of the acid and alkali used. H+(aq) + OH- (aq) → H2O(L) The combination of H+ and OH- ions in this way releases energy. In this practical‚ the
Premium Sodium hydroxide Enthalpy
Topic 6 Water Quality and Water Management What determines water quality? Drinking water should be colorless‚ odorless and flavorless; this means that there are no organisms and sediments in the water‚ but it does not mean that if your drinking water look‚ smells and taste clean‚ that does not mean that there is nothing else it. Water also contains dissolved solids: •Sulfur •Calcium •Magnesium If water contains a lot of dissolved calcium and magnesium it is called hard water
Premium Water
instruments they should use for sampling of water sample. * To expose the students the proper technique to measure the water. * To give the students experience with sampling of water sample. Introduction Pollution can be defined as a harm to the environment which can cause a lot of bad consequences to human health‚ living resources and ecological. Thus‚ pollutants can be gain from many sources and can take many forms. The pollutants can contaminate land‚ water or air. In order to identify types
Premium Turbidity Sampling Sample size
Determination of the Concentration of Acetic Acid in Vinegar Lab Exercise 4 CHEM 1106 9/19/12 Purpose: Standardize a sodium hydroxide solution using a primary standard acid. Determine the molarity and the percent by mass of acetic acid in vinegar by titration with the standardized sodium hydroxide solution. Introduction: Vinegar is a dilute solution containing acetic acid. Since vinegar has a low pH‚ it can be titrated with a base. Titration is a method used in order to ascertain
Premium Acid Acetic acid PH
What is Beauty? Beauty can be seen differently by every single person in the world. Though people see beauty differently there are specific features the world universally sees as beautiful. There are a few scientific determinants of how attractive a person is and the society and culture a person lives in can contribute to how one person perceives beauty. To determine a person’s beauty it is up to someone to decide what the most important feature of a person is. A person may believe someone’s
Premium Obesity Body mass index Body shape
needs water to survive. Water is our most important resource that is required to ensure our survival. This resource is something that we use every day in our lives and it serves many different purposes. We use water to take showers‚ to flush the toilet‚ cook dinner‚ to drink‚ and to clean. Water is not only used for our domestic needs‚ or wants but it is used in agriculture‚ industries‚ transportation‚ and as an alternative energy source (Lenntech‚ 2008). Life would be impossible without water. All
Premium Water Management Water supply
Introduction A system is considered in a state of equilibrium when its properties do not change at time passes. Equilibrium is a state of a reaction where the concentration of all the reactants and all the products remain constant over time. Equilibrium as used in chemical systems means that all the chemical forces in a reaction are in balance and that all physical properties of the system (color‚ density and concentration) of all chemicals species involved remains constant. The equilibrium state
Premium Chemistry Temperature Chemical equilibrium
1 pH‚ Protisits‚ and Ponds Everything Pond Water 2 Introduction Humans are surrounded by thousands of bodies of water throughout the world. What makes a lake differ from an ocean? Or what makes a pond different from a lake? A pond is a body of standing water either natural or man made‚ that is usually smaller than a lake. Ponds contain amazing biodiversity‚ providing an environment for birds‚ fish‚ amphibians‚ alages‚ protists‚ and many many more organisms. A pond is normally much shallower
Premium Water Algae Bacteria
Determining the Percent Copper and Zinc in Pennies from Density Lab Report Procedure: For pre-1982 pennies- Mass 10 pennies‚ record data. Fill a 100mL graduated cylinder to 40mL or enough to fully submerge the pennies with water‚ record the volume in data table. Carefully place the pennies into the graduated cylinder‚ record the final volume of the water in data table. To find the volume of the pennies‚ subtract the final volume from the initial‚ record the data. Repeat this procedure twice more
Premium Density Accuracy and precision Volume
Self determination means the right to determine ones own life. Client self determination in the context of modern day social work relates to the idea that we want our work to be anti oppressive and to empower our clients. It’s a theory that requires that we respect our client’s rights and dignity and we believe that nobody is more qualified to run their lives but them. The Australian Association of Social Workers Code of Ethics (AASW) outlines the role of the social worker and puts in place ethical
Premium