The Solubility of Potassium Nitrate Aim To investigate how the solubility of Potassium Nitrate is affected by Temperature. Background Knowledge Potassium Nitrate (KNO3) is an ionic compound. The strong ionic bonds hold the compound in an ionic lattice which gives KNO3 its crystalline structure. These ionic bonds also have other properties which will affect my investigation, I must be aware of these properties for greater accuracy in my method. The ionic bonds give KNO3 high melting
Purpose: Collect the experimental data necessary to construct a solubility curve for potassium nitrate (KNO3) in water. Materials: Balance, hot plate, microspatula, 4 boiling tubes (18 x 150-mm), boiling tube holder, boiling tube rack, 400-mL beaker, thermometer, graduated cylinder, stirring rod, iron ring, utility clamp, wire gauze, marking pencil, potassium nitrate (KNO3), distilled water, safety goggles, lab apron Procedure: 1. Using a marking pencil, the boiling tubes were labeled 1 through
of Potassium Nitrate Stability --------- Stable. Strong oxidizer - contact with combustible material may cause fire. Incompatible with combustible materials, and strong reducing agents. Toxicology ---------- Harmful if swallowed. May cause reproductive disorders. ------------------------------------------------------- Hazard: oxidizing ----------------- Aim The aim of this experiment is to determine the crystallisation temperature of the solution potassium nitrate
calculation the value of equilibrium energy chance is related to value of equilibrium constant of a particular temperature. The objectives of the experiment is to measure the solubility of potassium nitrate in water at several temperatures and to calculate Ksp, delta H, delta G, and delta S for potassium nitrate dissolving in water. The procedural modification in this experiment was the total of KNO3 for each determination. The safety precautions was handling the KNO3 solution with care it is an oxidizing
important role in the Civil war and gunpowder involves a great deal of chemistry. It consists of three ingredients sulfur, charcoal, and potassium nitrate (saltpeter). For only three ingredients the chemical reaction is a very complicated and its chemical equation is 4 KNO3 + C7H4O + 2 S ------> 2 K2S + 4 CO2 + 3 CO + 2H2O + 2 N2. The KNO3 is potassium nitrate, the C7H4O is charcoal, and the S is sulfur. What many people don’t know is that black powder doesn’t cause an explosion. The explosion
History of Fireworks The birthplace of fireworks is generally recognized as China. It is said that a Chinese cook accidently mixed three common kitchen ingredients (black powder): Potassium nitrate or salt petre, sulphur and charcoal and lighted it. The result was colourful flames. The cook also noticed that if the mixture was burned when enclosed in the hollow of a bamboo shoot, there was a tremendous explosion. The first application of this technology was for entertainment. Slowly the
gunpowder. “Imagine their enemy's surprise when the Chinese first demonstrated their newest invention in the eighth century AD. Chinese scientists discovered that an explosive mixture could be produced by combining sulfur, charcoal, and saltpeter (potassium nitrate). The military applications were clear. New weapons were rapidly developed, including rockets and others that were launched from a bamboo tube” (Franklin Institute). The Chinese are known for their inventions that still are used in the modern
up the basic fireworks: Oxidizers The first thing in a firework is the oxidizing agent. These produce the Oxygen to burn the mixture. Oxidizers are usually nitrates, chlorates or perchlorates. The common oxidizers are nitrates. These are made up of a metal ion and the nitrate ion. I'll use potassium nitrate as an example. Nitrates only give up 1/3 of their oxygen. The resulting equation would look something like this: 2KNO3 ---> 2KNO2 + O2 The next Oxidizers are chlorates are also made
faster. Plants need twenty essentail elements to help them grow. Plants make carbohydrates. A plant needs nitrogen, phosphorus, potassium, calcium, sulfur, and magnesium the most to grow healthy. Most soils naturally contain enough trace elements for field crops, but such elements must be added when certain fruits and vegetable plants are grown. Nitrogen, phosphorus, and potassium are the top three elements needed in plant growth. Legumes are plants which absorb nitrogen gas from the air and bring the
In this lab, solutions of lead nitrate and potassium iodide will be mixed at a number of dilutions. The reactions will then be observed to see at which point a precipitate no longer occurs. Ksp will then be stated as a range of values at room temperature, and the precipitate test tubes will be heated until the precipitate is dissolved so that Ksp may be observed and determined at different levels. In this experiment various solutions of lead nitrate and potassium iodide were mixed at a number of
can be added to the soil in which the plants are growing. When plants are unable to absorb enough an important mineral they show signs of deficiency. If to little nitrate, phosphate, potassium, iron, magnesium, sulphate or calcium is absorbed by the plant, its appearance and growth will be affected. For instance, potassium helps photosynthesis and magnesium is needed for the plant to manufacture chlorophyll. If magnesium is in short supply, the leaves, particularly the old ones become
and cation of an unknown ionic compound. Materials and Methods: Project Part 1: Cation analysis In the first part of this project, two cation elimination tests and one cation confirmation test were performed. 10 drops of 4 cation solutions: potassium, zinc(II), copper(II)
copper and zinc half-cells. 3. Put approximately 2 mL 1.0 M zinc nitrate solution in one of the center wells of a 24-well plate. 4. Put approximately 2 mL of 1.0 M copper (II) nitrate in an adjacent well. Polish small strips of zinc and copper metal, and place the metal in the appropriate well containing the solution of the ions of that metal. 5. Take a small strip of filter paper that has been soaked in potassium nitration solution, and drape it across the wells so that one end dips
water. Inorganic substances like sulfate, chloride, and nitrate will affect the water and create a high conductivity. The conductivity of distilled water is 0.5-3 Ohms. The reading the voltage meter gave us was a 84 Ohms, this is considered to be very conductiv... ... middle of paper ... ...Cooperative Chemistry Laboratory Manual. 5th. United States of America: McGraw-Hill, 2012. 59-61. Print. Helmenstine, Anne. "Purple Fire & Potassium." About.com Chemistry . About.com , 14 Nov 2011. Web. 2
Potassium is an element on the periodic table that is symbolized by the letter K. The atomic number of this element is 19. At room temperature this element is a solid. Potassium can be found in two forms: either pure or compounds. Pure potassium is described as a soft silvery-white alkali metal that oxidizes rapidly in air and is very reactive in water However, Potassium forms many compounds such as Potassium chloride, which is the most common potassium compound (Gagnon, 1). This form of Potassium
or harmful chemicals) Silver nitrate Unknown solutions Observations Unknown chemical A Halide goes a strong cloudy white Unknown chemical B Sulphate stays a transparent blue Barium Chloride 2 unknown Chemical solutions Observations Unknown chemical A Halide no change stayed
difference between potassium and sodium was not discovered until the 18th century. "Vegetable alkali" also known as potassium carbonate came from the earth. "Mineral alkali" also known as sodium carbonate came from wood ashes. Early chemists did not recognise that these were two different chemical compounds. Sir Humphry Davy discovered potassium in 1807 in England, by isolating it using electrolysis. Potassium was the first metal to be isolated by using electrolysis. The name potassium originated from
placed accordingly on the table. Potassium is in the alkali metals which is placed in group 1 of the table, alkali metals are among the most active metals. This element was found in 1801 by a man named Humphry Davy. Although the element does not have many uses in pure form as a compound it has many important purposes. Potassium is naturally in the human body if levels become too low or too high then it could cause problems for the individual. Low levels of potassium could cause muscle problems such
ended up starting at 6.4 and use all of it up to 49.0. To make silver nitrate, we used (0.5 mol) *(.250 dm squared) which equals .125, then times .125 by the molar mass which is 169.82 to get 21.2275 grams. From that point, we were able to make the solution of silver nitrate. Processed data In this titration, potassium chromate was used for the indicator. There were 3 drops of indicator each time a titration was done. The potassium chromate was made by (250 mL) *(0.1 dm squared) which equals 0.0050
No orange/yellow No [IMAGE][IMAGE]Bromine water Change precipitate precipitate 4: Phenol carboxylic acid 5: Test with an acidified potassium dichromate