Chemistry SL Internal Assessment: Enthalpy Change Design Lab Experiment: Reaction of distilled water and solid sodium hydroxide RESEARCH QUESTION How does the heat released during the reaction between distilled water and Group 1 elements (lithium‚ sodium and potassium) vary as one goes down the group? OBJECTIVE The objective of the experiment is to measure the heat change during the reactions with minimal heat loss to the surroundings. MATERIALS The materials to be used in this experiment
Premium Sodium Potassium Lithium
Introduction: Copper has played a vital role in past civilizations and continues to do so today due to its many properties as a metal. Although advantageous in today’s economy and also in human bodies‚ high concentrations of copper can prove toxic to our health and even pollutant to the environment. By altering the element through a number of chemical reactions including redox‚ metathesis‚ decomposition‚ and single replacement reactions‚ the cycle will be complete once solid copper is recovered.
Premium Copper Metal Iron
Cu2+(aq) + Zn + Cu + Zn2+(aq) (Balanced) Stage 1 Dissolution of Copper Mass of vial & copper = 3.598g Mass of vial = 2.504g Mass of copper = 1.094g Calculate the moles of copper‚ this is the mass of copper (in g) divided by the atomic mass of copper‚ (63.5 g/mol) Moles of copper = mass (g) ÷ (63.5 g/mol) = 0.017g/mol Copper description Solid ribbons‚ of a reddish-brown metallic appearance. HNO3 description Clear transparent
Premium Chemistry Copper Nitric acid
experiment is to convert copper metal through a series of intermediate copper compounds back into copper metal. By weighing the copper at the beginning and at the end of the experiment the percentage yield can be determined. Method: The experiment was carried out as outlined in the practical manual. Results: Table: showing masses: Mass copper wire 0.2510 Mass crucible 28.9257 Mass watch glass 19.6213 Mass watch glass + copper 19.7890 Mass copper product 0.1677 Calculations:
Premium Chemistry Copper Chemical reaction
Moles of Iron and Copper Lab Data and Observations Before the reaction: Mass of empty‚ dry beaker: 153.44g Mass of beaker + copper (II) chloride: 161.44g Mass of two iron nails: 7.27g After the reaction: Mass of two iron nails: 6.29g Mass of beaker + copper (dry): 154.50g Questions and Calculations 1. a) Mass of two iron nails before the reaction – Mass off two iron nails after the reaction = Mass of iron used in the reaction = 7.27g – 6.29g = 0.98g
Premium Chemistry Atom
In Copper Sun‚ Amari is a happy teenage and she is a slave. She was engaged to the most handsome man in her African village. One morning Amari goes outside and her little brother kwasi was hanging from a tree being silly and Amari goes to get her mom some vegetables for breakfast and out of nowhere white men enters Amari’s village setting things on fire and killing people. After a while then men took chained and shackled her and put her into a slave ship. A few weeks later Amari was sold to a man
Premium English-language films Family Fiction
Abstract— This thesis will analyze several similarity measures in a dental identification context. This identification will be based on a 3D scan of a patient’s skull and 2D radiographic images taken respectively post- and ante-mortem. This approach allows to circumvent the variable projection direction and/or incorrect patient positioning when capturing the classic 2D bitewing and periapical images. Three classes of experiments can be distinguished in this paper. First‚ there are the registrations
Premium Dentistry Teeth Scientific method
Chilean Copper Mine Collapse Chilean Copper Mine Collapse A small copper mine in San Jose‚ located in north Chile‚ collapsed trapping workers underground. The mine collapsed on August 5th‚ trapping 33 workers in the mine. The coverage of this mine collapse came two long weeks after the traumatic event. Initially the incident did not catch any news worthy attention. Mine collapses are pretty common but the accident finally caught the interest of an editor‚ and then it went viral from
Premium Mining Accidents Chile
AP Chemistry 12/13/11 Round-Trip Copper Reactions Lab The purpose of this lab was to evaluate our skills of decanting a supernatant liquid without losing the solid and successful completion of a series of reactions. This was done through five chemical reactions involving copper. In this lab‚ elemental copper was put through five different chemical reactions in order to convert it into different compounds. By the end of the fifth reaction‚ the copper was back to its elemental state. In the
Premium Sulfuric acid Copper Chemistry
Dark Matter (Review) Dark Matter (Review) Kenneth Lathrom Kenneth Lathrom 6th Period Dark matter is the missing piece to the astronomical equation of galactic gravitation. Simply put it is the objects we do not know and cannot see that explain why the farthest planets don’t follow the “norm” and hurtle away from the center of their designated galaxy. Astrophycists have been looking for signs of these unseen particles. Having theorized that when two dark matter particles collide they
Premium Particle physics Matter Astronomy