initially filled with 25mL of 0.201moldm-3 sodium hydroxide (NaOH) to titrate 25mL (±0.03mL) of unknown acid X in mL (±0.05mL) after each titre. Reading on the burette initially filled with 25mL of 0.201moldm-3 NaOH (±0.05mL) First titre 21.3 Second titre 18.2 Third titre 15.2 Fourth titre 12.0 Qualitative data Observations: When dissolving the acid X in the water‚ most of it did not dissolve and become whitish foam sitting at the top of the solution. When transferring the acid from
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transformations are that light must be absorbed by a compound in order for a photochemical reaction to take place‚ and that for each photon of light absorbed by a chemical system only one molecule is activated for subsequent reaction. This "photo equivalence law" was derived by Albert Einstein during his development of the quantum (photon) theory of light. Absorption of visible and/or ultraviolet light by a molecule transfers all the energy of the photon to one molecule. This is sufficient energy to excite
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Abstract: This report presents the reason why the ocean does not freeze in the winter. Since the ocean consists of salt water‚ an experiment was done to test the effect of freezing on salt water compared to pure water. The experiment was conducted three times in order to obtain accurate results and eliminate errors. In addition to the salt and pure water experiment‚ a variation of this experiment was created to test other options. In the variation experiment the effect of freezing on sugar water
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elements which make up about 98% of Earth’s entire mass. 2. The most abundant element in the Earth’s interior is __________________ (fill in the blank). The Second most abundant element in the Earth’s interior is __________________ (fill in the blank). 3. The most abundant element in the Earth’s crust is __________________ (fill in the blank). The Second most abundant element in the Earth’s crust is __________________ (fill in the blank). 4. List the 8 elements which make up most of the Earth’s crust. 5
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forms of infectious diseases. The chemotherapeutic agent works by stopping the bacteria from reproducing. There are two different kinds of chemotherapeutic agents. The first kind is an antibiotic‚ which slow down the growth of microorganisms. The second kind of chemotherapeutic agent is synthetic drugs. Synthetic drugs are artificially made in a laboratory. Chemotherapy began in the 1940s and is now a multi-billion dollar industry. Different antibiotics and synthetic drugs all have different modes
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Groelke________________________________________________________________________ Date______November 13‚ 2012_______________________________________________________________ Course and Lab Section Number___PHY 1150-202________________________________________________ Collaborators_Briana‚ Travatello‚ Grayson North‚ Roy Huffman ______________________________ |Laboratory Report Scoring Rubric | |
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2013 The Life and Works of Sir Isaac Newton Sir Isaac Newton‚ (1642-1727)‚ mathematician and physicist‚ was one of the greatest scientific minds of all time. Sir Isaac Newton was born at on January 4th (December 25th old calendar) at Woolsthorpe‚ a farmstead‚ in Lincolnshire. Woolsthorpe is the place where he worked on his theory of light and optics. This is also believed to be the site where Newton observed an apple fall from a tree‚ inspiring him to make his law of universal gravitation. He entered
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isotope 14C differs from 12C in that 14C has (pick one of the following) more; less; same) neutrons. 10. Electrons are arranged in electron shells. The electron shell closest to the nucleus has a maximum capacity of _2___ electrons‚ whereas the second shell holds a maximum of _8__ electrons for elements in Biology. 11. The outermost shell is referred to as the __valance__ shell. The electrons in the outermost shell are referred to as the _valance_ electrons. 12. Trick Question: How many
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Projectile Motion Lab: Using a Toy Gun Purpose: The purpose of this investigation is to measure the vertical displacement‚ or height of the launch‚ and the horizontal displacement‚ or range‚ travelled by a projectile (bullet from toy gun). Questions: What is the shape of the actual path travelled by a projectile? How closely does an actual projectile’s results follow the theoretical predicted results? Hypothesis: The shape of the path travelled by the projectile‚ in this case the bullet of
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| | Kinetics Author: Katie Wood Instructor: Donald Kavanagh Chem 106b‚ Section 001 Lab Performed 8th‚ 2012 Lab Report Submitted February 22nd‚ 2012 Abstract The purpose of the lab was to determine the order of reaction for the dye Red #40. By measuring the reaction rate between bleach and the dye‚ the order of the reaction was determined to be first order. Introduction The study of kinetics is important for studying the amount of time it takes for a particular reaction to reach
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