Startle reaction

physical and chemical change. The melting of the wax is an example of physical change, the heat source caused the surrounding wax to melt and drip down the sides of the candle, which then re-hardened after exposure to the air. The flame, is a chemical reaction, which burns wax vapor, which combines with oxygen to produce carbon dioxide and water vapor. Without…

Group Members Zoe Ching, Juliet Contreras, Ailly Lam, Aleksi Ska. Background information Enzymes are biological catalysts, which speed up the rate of chemical reactions. The pancreas produces a concentrated solution containing a mixture of enzymes – amylase, lipase and protease. In this experiment you will examine the effect of protease on casein, the protein found in milk. When the protease breaks down the casein, the opaque solution will become transparent. Theoretically, Enzyme activity…

Damaged hair, as much as it hurts to say this, all hair eventually becomes damaged in some way. Damaged hair is a problem because as hair follicles start to dry out and split, your hair’s natural instinct is to try and take care of itself with it’s natural oils. Those natural oils are what we call: hair grease. The more damaged the hair is, the more oils come out to try and help it get back to a good shape. The problem with that is, with hair styling and extra product, those oils don’t help your…

Green Synthesis of Ibuprofen Green Chemistry is a new approach and perspective of chemistry that can improve human lives and maximize efficiency. It is a branch in chemistry that explores and examines techniques to reduce and eliminate hazardous and harmful substances. These harmful substances effect humans and the environment in multiple ways, the twelve principles of Green Chemistry can help minimize them. The twelve principles include prevention of waste, the design of less hazardous…

The chemical reaction can be dangerous I used the, A: soap and bleach and B: soap and water. The reaction in A as the week pass the soap starts to get smaller and smaller, on the left and the right it got white a little. The chemical reaction on A is that the bleach got clear and light at the soap that have been use in the experiment. In Bowl B the water and soap that have been used in the experiment was breaking up, getting lighter. In bowl B the soap took away the walker as the week have…

In the scientific world, there is a significant difference between calculated values and values measured in investigations. Percentage Yield is the ratio, between masses, of the actual yield to the theoretical yield. The actual yield is the amount or mass of product actually collected during an experiment or industrial process, while the theoretical yield is the amount or mass of product predicted based on the stoichiometry of the chemical equation. In order to calculate the theoretical yield,…

Scenario 1 describes the reaction that takes place between H2 and I2 to form the acid HI. This reaction involves very intricate and steps that are critical to understanding the concept of equilibrium as a whole. First, an important concept to understand when describing any reaction is the idea of collision probability. When we examine gas molecules in a 1 cm3 container, there can be billions of collisions per second between neighboring molecules, and even then, maybe only one of these collisions…

the quantitative branch of chemistry, called analytical chemistry, which aims not just to determine the component but also to quantify the amount of the component in the sample. Redox titration is an analytical method which is based on a chemical reaction between an oxidizing agent and a reducing agent. Permanganimery is a common redox titration component because of its high standard reduction potential, making it a good oxidizing agent. Permanganate reacts with oxalic acid according to Equation…

The GCMS analysis showed the metabolites could be definitely identified as concern compound by comparisons with known authentic compound. The m+ ion is found at m/z94 for phenol. The molecular weight of the phenol is 94. The base peak value of phenol was observed as 94 and mass peak values were recorded as 66, 39, and 55. The m+ ion for acetophenone is m/z 120. The molecular weight of the compound was observed as 120, the base peak and mass peak values were recorded as 105 and 91, 77, 51, 39,…

Michael is an IG2 chemistry student. He has to his disposal, in the chemistry lab, the chemicals sodium chloride, in both chip and powdered form, and hydrochloric acid. Michael decides to mix the two substances by pouring the hydrochloric acid on the sodium hydroxide in both states chip and powder form. Michael does not have an aim or reason for doing this so his intentions are unknown. Michael gives a possible outcome or hypothesis that as soon as the hydrochloric acid is added the chips of…