Sodium hydroxide

which allowed for the unknown compound to be identified with simple yes/no questions. Materials and Methods Part One: In the metal hydroxide test, the first step was to add 10 drops of…

Introduction Four reactions were done using coffee cup calorimetry for each. Two Styrofoam cups were stacked together for each reaction performed, with a piece of cardboard used as lid with a hole for the thermometer. The beginning and final temperatures were taken for all reactions and solvents used. The end result and point of the experiment is to find what ΔH. Also this is a constant pressure calorimetry experiment. The goal of each of the reactions is to get ΔHrxn which is represented in…

(alkali metal hydroxide). The alkali metals reacts very fast and violent with water, as when you place the metals (lithium, sodium or potassium)…

Title The Copper Reaction Cycle demonstrated in the experiment shows that copper can transform into different states of matter, while still conserving mass and returning back to its original room temperature solid state. Authors Makenzie Roybal * and Erin Wimberley Section CHEM 111-554 Introduction A topic of allure to many scientists is how high levels of copper intake can result in the disruption of human metabolism, and how it can degenerate the biological well being of ecosystems. The…

water and the solid copper chloride. The observation of the liquid turning clear represents the water and seeing the particles represents the precipitate. The yield of copper chloride is 1.49 grams. This demonstrates the transformation of the copper hydroxide being converted into regular copper oxide and with the rest of the mass becoming water. The limiting reactant was the copper oxide and the excess was hydrochloric acid. The analysis behind this is that if there was not enough hydrochloric…

(aq) Nitrogen dioxide(g) + water (l) Cu(s)+4HNO3(aq) (CuNO3)2+2NO2(g)+H2O(l) - Colour change from blue to green - Orange gas was emitted 2 Copper nitrate (aq) + Sodium Hydroxide (aq) Copper Hydroxide + Sodium Nitrate Cu(NO3)2(aq)+2NaOH(aq) CuOH(s)+2NaNo3(aq) - Colour change from green to blue - Gas was produced, vapour 3 Copper hydroxide (s) + heat (aq) Copper Oxide (s) + water(l) Cu(OH)2(aq)+heat(aq) CuO(s)+H2O(g) - Colour change, from blue to black - Black precipitate was formed 4 Copper…

Equation of trendline 1 calculation: m= rise/run = 12/15 = 0.8 c= 5.9 y= 0.8x + 5.9 Equation of trendline 2 calculation: m= rise/run = 25/45 = 0.5 c= 17.6 y= 0.5x +17.6 Point of intersection: Equate both trendlines to find point of intersection 0.8x + 5.9 = 0.5x + 17.6 x= 39 Since x=39, x2= 9 as x2 represents x in descending order. R2: R2 for trendline 1 = 0.98 Correlation coefficient for trendline 1= 0.96 R2 for trendline 2 = 0.98 Correlation coefficient for trendline 2= -0.99 Ratio…

oxidized, it loses two hydrogen atoms and becomes the benzoic acid. However, other than using oxidation process, there is another way to obtain benzoic acid, called liquid-liquid extraction. By adding an aqueous solution of sodium hydroxide (Base), benzoic acid is converted to the sodium salt of benzoic acid (conjugate base), which makes it have a much higher solubility in water. However, toluene has water-insoluble property, which means that the separation between toluene and benzoic acid can…

Ashley-Ann Burnett October 4, 2015 Lab #3: Acids, Bases & pH SLS43-14/7-8 Pre-Lab Questions: 1) An isotope is an atom with a different atomic weight due to changes in the number of neutrons in the nucleus. Some examples of isotopes are Protium, Deuterium, and Tritium, which are all Hydrogen atoms. Instead of the zero neutrons Hydrogen has in its Protium form, Deuterium and Tritium have two and three neutrons respectively. This change in neutron number and…

to room temperature. When the reaction mixture was cooled, solids started to form on the sides of the beaker. The solids were black and chunky and there was some liquid left in the beaker. The products that were formed in this reaction by copper hydroxide were copper oxide and water. This reaction that took place was a…