ratio because pKa is constant. The pH of any solution can be accurately determined by pH metric method and if the ratio is known‚ the dissociation constant can be calculated. Apparatus: Material Quantity Uncertainties pH Meter 1 ± 0.02 pH Glass Electrode 1 - Volumetric Flasks (50cm3) 5 - Beaker (1000cm3) 2 - Beaker (50cm3) 1 - Water Bath 1 - Measuring Cylinder (50 cm3) 1 ± 0.5 cm3 Measuring Cylinder (10 cm3) 1 ± 0.05 cm3 Acetic Acid (0.1M) - - Sodium Acetate (0.1M) - - Potassium Hydrogen phthalate
Free PH Acid dissociation constant
4 Titration Curve of an Amino Acid pH Simple amino acid Acidic amino acid Basic amino acid 7 OH- equivalents Objectives: A) To determine the titration curve for an amino acid and B) to use this curve to estimate the pKa values of the ionizable groups of the amino acid and the amino acid’s pI. Introduction: A titration curve of an amino acid is a plot of the pH of a weak acid against the degree of neutralization of the acid by standard (strong) base. Consider the ionization
Premium Acid Amino acid Acid dissociation constant
happens in liquids. The liquids that can be electrolyzed are called electrolytes. When said electrolyzed‚ means that the compounds in solutions are broken down when they conduct electricity. Its necessary the use of electrodes since it conducts the electricity to the solution. The electrodes are needed to be an anode‚ which receives the negative ions‚ and the cathode‚ which receives the positive ions. II. Materials * College power unit * Black and red wires * Beakers * Carbon
Premium Potassium Sulfuric acid Sodium chloride
Thomson (1856-1940) Are negatively charged subatomic particles. Thomson’s Experiment passed electric current through gasses at low pressure sealed the gases in glass tubes fitted at both ends with metal disks called electrodes electrodes connected to source of electricity one electrode
Premium Electron Atom Electric charge
bulk and electrodes. The complicated‚ bulky wiring involved in current hospital monitoring can be inconvenient and distressing for both patients and doctors. For example‚ a patient with heart disease is usually required to wear a large‚ inconvenient monitor for a month or more in order to capture abnormal but rare cardiac events. Applied just like a temporary tattoo‚ the device sticks to the patient’s skin. The device can bend‚ wrinkle‚ and stretch without being damaged. The best electrodes on the
Premium Skin Patient Engineering
citrus fruits will be excellent conductors due‚ again‚ to the high acidity level. Read more: http://www.ehow.com/info_8289020_fruits-vegetables-conduct-electricity.html#ixzz2foj8MFkb Making a Circuit When a fruit or vegetable is connected with electrodes in a circuit‚ the fruit or vegetable serves as the battery to complete the circuit and light a small light bulb. Current and Voltage If several pieces of fruit or vegetables are connected in a parallel circuit‚ it gives off a higher current. If
Premium Fruit Tomato Vegetable
known as a Voltaic cell. It was named after Luigi Galvani and Alessandro Volta. A galvanic cell is capable of producing an electric current from a redox reaction that occurs within it and consists of two half cells. Each half cell consists of an electrode and electrolyte and a salt bridge. In a galvanic cell one metal can undergo reduction and the other oxidation. A typical galvanic cell is based on the spontaneous redox reaction: Net Ionic Equation Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) Half Equations
Free Electrochemistry Zinc Battery
Welding Operations : There are two types of welding being done: * METAL INERT GAS WELDING ( MIG ): It is a welding process in which an electric arc is formed between a consumable electrode wire electrode and a work piece metal‚ which heat the work piece metal‚ causing them to melt‚and join. Along with a wire electrode a shielding gas is fed through the welding gun‚which shields the process from contaminants in the air. The process can be semi –automatic or automatic. A constant voltage‚ direct
Premium Welding Oxygen
The halides in unknown solution were identified as iodide and chloride based on their experimental E°(Ag/AgX) values‚ -0.16 ±0.01V and 0.22 ±0.02V respectively. These results were both accurate with percent error of 5.96% for iodine and 0.9% for chloride. The literature value of E°(Ag/AgI) and E°(Ag/AgCl) were -0.151V and 0.222V respectively (1). In addition‚ the literature vales lay within the 95% confidence interval for both halides therefore the results were accurate. These results were precise
Premium Chemistry Titration Acetic acid
Make a Carrot Battery This activity uses a common carrot and two different metals to make a enough electricity to run a small digital clock. Materials: Two Large Raw Carrots; 2 Pennies; 2 Large Galvanized Nails; 3 pieces of 6" long wire; Small Digital Clock (Tandy (Radio Shack) or Maplin - "Stick-on Timer" £3.50/ $4.99. The digital clock can be extracted from an inexpensive alarm clock or it can be purchased from an electronics store. Slice of about 1 inch from each carrot and discard. Place
Premium Battery Electric charge Zinc