analysis Date: 29 September 2012 Analysis of Phosphate Introduction The aim of the experiment is to determine the concentration of phosphate ions in unknown samples. A series of dilution of known concentration is performed from the phosphate working solution. Each of the prepared working standards‚ the unknown samples and the blank are then made to react with a mixed reagent which have been prepared after acid wash of the glasswares Glassware * 2 Beakers * 11 conical flasks
Premium Hydrochloric acid Respiratory system Phosphoric acid
can lead to high-vapor pressure deficits that can trigger stomatal closure [8]. Chemically‚ over 100 compounds have been identified in smoke [9]. Of those that have been identified‚ many are known to have physiologically effects on plants‚ including NO2 [10]‚ CO2‚ SO2‚ and O3 [11]. O3 has been linked to the destruction of chlorophyll [12] and has also been shown to inhibit the K+ channels that regulate guard cell function and in turn controls stomatal opening [13]. SO2
Premium Photosynthesis Oxygen Carbon dioxide
Quan Chapter 15: Redox Titrations 1. (A) Which of the following is true of a redox titration? (i) Since the redox reaction is spontaneous‚ the equilibrium constant does not have to be large for an effective titration. (ii) The titration effectiveness is increased when the two half-reaction potentials are far apart. (iii) Without an indicator the equivalence point cannot be detected. (iv) For an effective redox titration‚ the reducing agent must always be in the buret. (v) The equivalence
Free Titration
predominantly the meta-isomer as product while the weakly deactivating halogens give predominantly give ortho- and para- isomers as products. The functional group of ester is an electron withdrawing group causing nitrobenzene (NO2) to become in the meta position. Thus NO2 is a deactivating group causing itself to be a meta director. Basically when look at the substituents that are attached to the starting benzene ring in order to figure out whether the reaction with be ortho or para directors or
Premium Electrophilic aromatic substitution Sulfuric acid Benzene
station is positioned 29m from Lord Street and 30 m from Duke Street. This monitoring site operates as RDAS site from 2nd of October 2000. Monitoring has begun on 3rd of January 1983. Pollutants monitored are Carbon Monoxide (CO) and Nitrogen Dioxide (NO2)‚ while Ozone (O3)‚ Hydrocarbons (HC) and particles are not monitored on this station. (EPA‚2011) b) [pic] Fig.1 Relative changes in concentration of monitored pollutants over a 24 hour period c)Carbon Monoxide (CO) is primary pollutant
Premium Air pollution Global warming Ozone
Quiz Top of Form Previous PageNext PagePage 1 of 4 Note: It is recommended that you save your response as you complete each question. Question 1 (2.7 points) The combustion of butane‚ C4H10(g)‚ produces carbon dioxide and water vapor. In the balanced equation for this reaction‚ what are the coefficients of butane‚ oxygen‚ carbon dioxide‚ and water‚ respectively? Question 1 options: 2‚ 13‚ 4‚ 10 1‚ 6‚ 4‚ 5 1‚ 6‚ 8‚ 10 1‚ 13‚ 4‚ 5 2‚ 13‚ 8‚ 10 Save Question 2 (2.7
Premium Oxygen Hydrogen Nitrogen
Chemistry Assignment Name : Lorna Ng Xin Mei Student ID : 1000620 Group Members’ Name: Sim Koshin Chen Chui Ting Bhindia Pooja Rayel Title : Paper Chromatography Photochemical Smog Lecturer’s Name : Ms. Usha Nanthini Table of Content No. | Content | page | 1. | Paper Chromatography | | | 1.1 Definition | | | 1.2 Background | | | 1.3 Rf Values | | | 1.4 Principles of Paper Chromatography | | | 1.5 Procedure
Premium Oxygen Ozone Smog
A.P. Chemistry Practice Test: Ch. 12‚ Kinetics MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Consider the following reaction: 3A ¬ 2B The average rate of appearance of B is given by D[B]/Dt. Comparing the rate of appearance of B and the rate of disappearance of A‚ we get D[B]/Dt = _____ x (-D[A]/Dt). A) -2/3 B) -3/2 C) +2/3 D) +3/2 E) +1 2) A burning splint will burn more vigorously in pure oxygen than in air because A) nitrogen is
Premium Chemical kinetics Rate equation Chemical reaction
the formaCon of one mole of a compound from its elements with all substances in their standard states. 1/2N2(g) + O2(g) NO2(g) ΔHf° = 34 kJ/mol ΔHf° = -‐239 kJ/mol C(s) + 2H2(g) + 1/2O2(g) CH3OH(l) In Appendix 4 32 STANDARD ENTHALPIES OF FORMATION Conven1onal Defini1ons
Premium Ethanol fuel Energy development Enthalpy
Preparation of methyl m-nitrobenzoate by nitration using methyl benzoate‚ nitric acid‚ and sulfuric acid Aileen Quintana TA: Sijie Tues/Thurs 11:50 42067 Introduction: The purpose of this lab was to explore the concepts of electrophilic aromatic substitution‚ specifically nitration by synthesizing methyl m-nitrobenzoate using methyl benzoate‚ nitric acid and sulfuric acid. This nitration is a type of electrophilic aromatic substitution. A
Premium Benzene Electrophilic aromatic substitution