INVESTIGATION #2 DETERMINATION OF THE WATER OF CRYSTALLISATION April 4‚ 2012 OBJECTIVE: Chemical compounds that contain discrete water molecules as part of their crystalline structure are called hydrates. Hydrates occur quite commonly among chemical substances‚ especially among ionic substances. More often than not‚ such compounds are either prepared in‚ or are recrystallized from‚ aqueous solutions. Hydrates exist for ionic compounds most commonly‚ but hydrates of polar and non polar covalent molecules
Premium Water Chemistry Oxygen
Metro. The students will read English materials only when asked. Normally‚ a person would feel bored when doing something by force and so the students will quickly get bored when reading any material they do not like. Apart from that‚ the cause of weak students master the English language is most of the students to look at the English language only as a subject. They learn English just to pass the exam. They also assume that the English language is a tedious and troublesome. So‚ they think it is
Free English language United Kingdom Second language
Plop Plop Fizz Fizz Expt # 1 I. INTRODUCTION: In this lab I will try to see in what an Alka-Seltzer tablet will dissolve fastest in. I need to figure out if the Alka-Seltzer tablet will dissolve slowest or fastest in tap water‚ warm water‚ cold water‚ salt water‚ or acidic water. In this lab I wall develop and test a hypothesis‚ analyze data and draw a conclusion. In this experiment I will find out that in a type of water the Alka-Seltzer will dissolve faster and slower. Alka-Seltzer
Premium Acid Gastric acid Water
Experiment18 Aim To determination the partition coefficient of ethanoic acid between water and butan-2-ol. Procedure 1. The room temperature was recorded. 2. 15cm3 of the given aqueous ethanoic acid and 15cm3 of butan-2-ol were poured into a 100cm3 separating funnel‚ using suitable apparatus. The funnel was stoppered and was shook vigorously for 1 to 2 minutes. (The pressure in the funnel was released by occasionally opening the tap.) 3. 10cm3 of each layer was separated
Premium Solvent Solubility Sodium hydroxide
Determination of the Rate Constant for a Chemical Reaction Department of Chemistry Abstract This experiment was performed to determine the rate constant k‚ for hydrolysis of tertiary butyl chloride to tertiary butanol. The solvent system for this reaction is 45% isopropyl alcohol and 55% water. The rate of hydrolysis of t-butyl chloride is measured by the decrease in the concentration of this reagent with time. The rate of decomposition of t-butyl chloride must be equal to the rate of formation
Premium Chemical reaction Chemistry Reaction rate
RECRYSTALLIZATION AND MELTING POINT DETERMINATION OF BENZOIC ACID ANSWERS TO QUESTIONS 1. How does the use of fluted filter paper hasten filtration? Why is it advisable to place a small piece of wire between the funnel and the mouth of the flask during hot filtration? Fluted filter paper is effective in preventing crystal formation in the filter paper. It is also often used in filtering hot saturated solution used during crystallization. One major advantage of a fluted filter is that it increases
Premium Filter paper Solvent Filters
Which is more important- talent or determination? In the movie GATTACA‚ Vincent is part of a minority- those whose genes have not been manipulated before birth. He is known as an invalid. He has a heart problem‚ and a short life expectancy. With constant genetic testing in the workplace‚ and genetics playing such a huge role in his life‚ it will be difficult Vincent to get ahead. He dreams of space travel‚ but it seems unlikely for him. His brother Anton‚ however‚ who is a valid‚ or someone whose
Premium English-language films DNA Gene
ACID/BASE You might need to know the following K values: CH3COOH Ka = 1.8 x 10–5 Benzoic Acid Ka = 6.5 x 10–5 HNO2 Ka = 4.5 x 10–4 NH3 Kb = 1.8 x 10–5 HF Ka = 7.2 x 10–4 H2S Ka = 5.7 x 10–8 HSO4– Ka = 1.2 x 10–2 HS– Ka = 1.2 x 10–13 HCOOH Ka = 1.8 x 10–4 HOCl Ka = 3.0 x 10–8 SIMPLE ACIDS AND BASES 1. According to the Brønsted–Lowry definition‚ which species can function both as an acid and as a base? (A) Cl– (B) SO42– (C) NH4+ (D) HCO3– (E) H3O+ 2. Which of the following
Premium Acid PH Sodium hydroxide
Experiment #7: Acids‚ Bases and Salts Mabag‚ Viannery D.‚ Mangune‚ Paolo D. Chem 14.1‚ MAB1‚ Ms. Angelyn del Rosario March 8‚ 2010 I. Abstract The experiment allowed students to explore different electrolytes and classify them into acids‚ bases and salts by using different indicators or by measuring the pH levels of each. The experiment also helped students classify different substances through their conductivity properties. The preparation of a 1 M stock solution from NaOH pellets diluted to a
Premium PH indicator Acid PH
The theory that best applies to my behavior change‚ is the self determination theory. The self determination theory looks at motivation and personality and combines aspects of behavioral self regulation as well as personality development (Ryan & Deci‚ 2000). It takes into account the psychological needs of the person‚ and also looks at a combination of these factors in order to determine the type of motivation a person has. According to Ryan and Deci‚ there are three needs that need to be met for
Premium Psychology Motivation Maslow's hierarchy of needs