Ion exchange

Name: Lisa Brewer iLab, Week # 2 CATIONS AND ANION LAB Introduction The purpose of this week’s lab is to learn to demonstrate a double-replacement reaction of ionic compounds. To accomplish this, two ionic compounds will be mixed together and the product will precipitate out of solution. In this procedure, the product must be precipitated out of the solution and then weighed. For this lab, lead (II) nitrate (Pb(NO3)2) and potassium chromate (K2CrO4) will be reacted together to demonstrate

Effect of AA content on the swelling ratio of hydrogel Fig. 3b shows the effect of AA on the Q value of hydrogel. With increasing concentration of AA, the Q values of hydrogels increased and then decreased. When AA amount was more than 7 g, the Q values of hydrogels decreased because when the concentration of AA was high, the collision probability between monomers would increase, thus increasing the graft length of sulfonated cellulose, favoring the formation of a polymeric network at higher Q values

Identifying Unknown Ionic Salts by Precipitation --- Cindy Aim: identify three unknown ionic salts from zinc nitrate, barium nitrate, lead nitrate, sodium chloride, sodium carbonate and magnesium chloride by precipitation. Equipment: • 6 small test tubes • distilled water • measuring cylinder • 3 unknown ionic salts (No.7, 8, 9) • rack • silver nitrate • sodium hydroxide • calcium nitrate • sodium chloride • copper sulphates Method: 1. Pick three unknown ionic salts (NO. 7, 8 and 9) 2. Use

Introduction: This experiment is based on determining the chemical formula for a hydrated compound containing copper, chloride, and water molecules in the crystal structure of the solid compound, using law of definite proportion. The general formula of the compound is CuxCly•zH2O, and aim is to determine chemical formula of this compound. Law of definite proportion, sometimes called Proust’s law, states that a compound always has exactly the same proportion of elements by mass. This

possible charge (most of the transition metals) Nonmetals Polyatomic ions (these always have a known charge) All of the compounds you encounter will be one of two types: 1. Ionic Compounds (These are made by combining a metal with a nonmetal or a metal with a polyatomic anion, ionic compounds are held together by the interaction of positive and negative charges) These are made by combining a cation (an atom or polyatomic ion with a positive charge) with an anion (an atom or polyatomic with a negative

Chemical formulas are central to chemistry; they describe, identify, and predict the properties of compounds. Chemical formulas can be found by a process called gravimetric analysis in which components of a compound are isolated, their masses are found, and the mass differences recorded. Gravimetric analysis can be helpful when finding the formula of an ionic hydrate, an ionic crystal bound to water molecules because it allows for the mass of water to be found allowing for further separation of

Purpose Hydrates are inorganic salts that lose water when heated and undergo a color change. The loss of water makes the hydrate anhydrous. Copper chloride hydrate is what will be used in the lab to show what happens when a hydrate is heated which can lead to a better understanding of hydrates as a whole and their reactions that can be observed to discover things about the environment they’re in. After the removal of water from the copper chloride hydrate, the solid ,when reacted with aluminum and

Priya Talwar Chemistry 1411-008, (Group 06 Partners: Esther, Bethany, Sophia) 19 October, 2017 CSI: How to identify an unknown white powder Jiayue Sun Introduction The Identity of a chemical compound is extremely critical to observe. The identity can lead to discovering its properties and can aid in its classification. Thus scientist all around the world put high emphasis on the procedure to identify a compound through the flame test and chemical testing. Flame test works to identify the cation

I have learned from the computer analysis project that my intake in calcium is low, and my intake in sodium is high. My DRI reports showed me that I am receiving only 31% of the recommended daily value for calcium intake. An appropriate amount of calcium is 1300 mg, but I consumed only 409 mg. My DRI reports also showed me that I consumed above the recommended range for sodium. A deficiency of calcium has serious effects just as a toxicity of sodium does. After reviewing my reports, I learned that

turned a bright blue-green colour, but did not dissolve. This is because copper (II) chloride is an ionic compound and the forces of attraction holding it together are stronger than the force of attraction between water and the positive and negative ions. The coconut oil did not dissolve when added to the water because coconut oil is very nonpolar, so the water could not pull apart any of the positive or negative sides. When the glucose was added to the water, it dissolved immediately. The glucose