reaction‚ the magnesium will dissolve in the hydrochloric acid to produce hydrogen gas. This is because magnesium is higher than hydrogen in the reactivity series. Therefore‚ when the two reactants are combined‚ a displacement reaction occus and the magnesium displaces the hydrogen‚ forming magnesium chloride and hydrogen gas. Mg (s) + 2HCl (aq) -> MgCl 2 (aq) + H 2 (g) Magnesium + Hydrochloric acid -> Magnesium Chloride + Hydrogen Aim The aim of this investigation
Premium Chemical reaction Hydrogen Chlorine
PRACTICAL 7 TITLE : DETERMINATION OF ERYTHROSINE CONCENTRATION USING UV- VISIBLE SPECTROPHOTOMETER INTRODUCTION In chemistry‚ spectrophotometry is the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength. It is more specific than the general term electromagnetic spectroscopy in that spectrophotometry deals with visible light‚ near-ultraviolet‚ and near-infrared‚ but does not cover time-resolved spectroscopic techniques. Spectrophotometry
Premium Spectroscopy Chemistry Light
Determination of KHP – Acid - Base Titration For determining purity of unknown KHP‚ acid – base titration was used. Molarity of titrant in this case NaOH was standardized as 0.04958(±0.00011) M. Purity of unknown KHP was calculated as 35.88(±0.16) %. • Introduction Acid – base titration is typical method of determining unknown figures. Acid – base titration means that by using neutralization between acid and base. Abrupt changing of pH says whether procedure is done or not. pH indicators
Free Titration PH indicator PH
Experiment One Visible Spectrophotometric Analysis of Cobalt and Nickel Purpose Understand the function of the Spectronic 20 Spectrophotometer‚ the Perkin-Elmer recording UV-visible spectrophotometer and reveal the concentrations of nickel and cobalt in an unknown solution. Procedure In the Lab: Part B: Complex Formation Pipette 20mL aliquots into a 150mL beaker. Do the same with cobalt nitrate and nickel nitrate. Add between 0.70g and 0.90g of EDTA to each of the cobalt nitrate and nickel
Premium Pink Carbon monoxide Laboratory glassware
investigate how heat is given out in neutralizing sodium hydroxide (NaOH) using different concentrations of Hydrochloric Acid. Background Information:- Substances that neutralize acids are called alkalis. An acid is a substance that forms hydrogen ions (H+ ) when placed in water. It can also be described as a proton donor as it provides H+ ions. An example of an acid is hydrochloric acid (HCl)‚ Sulphuric acid (H2SO4) etc. An alkali is a soluble base and forms hydroxyl ions (OH-) when placed
Premium Hydrogen Hydrochloric acid Chlorine
EXPERIMENT 2 ACID DISSOCIATION CONSTANT OF AN INDICATOR DYE OBJECTIVES Using spectrophotometric method: determine the wavelengths at which the acid and base forms of the dye in aqueous medium exhibit maximum absorption; determine the molar absorptivities of the acid and base forms of the dye and estimate an unknown concentration of the dye in solution using the Beer-Lambert’s Law; and determine the acid dissociation constant of the indicator dye. THEORY The absorption or reflection of
Free PH Acid dissociation constant
Determination is a positive emotion that involves persevering towards a difficult goal in spite of obstacles.[1][2] Determination occurs prior to goal attainment and serves to motivate behavior that will help achieve one’s goal. Empirical research suggests that people consider determination to be an emotion; in other words‚ determination is not just a cognitive state‚ but rather an affective state.[3] In the psychology literature‚ researchers have studied determination under other terms‚ including
Premium Emotion Motivation
Introduction: The main objective in this experiment is to determine if the claims made by the US government‚ regarding the spectrophotometric analysis of a copper penny hold true. Before 1982‚ the Lincoln cent contained 95% copper and 5% various mixtures of zinc and tin. As the cost of copper increased‚ the cost to produce the penny was more than the actual face value of the penny. This caused the US government to change the composition of the penny. The pennies we know today consist of a copper
Premium Chemistry Currency United States dollar
In a brief essay‚ identify at least two of the implications implicit in the society reflected in the poem. Support your statements by specific references to the poem. The Unknown Citizen Comment [ANn1]: OK‚ so I need to IDENTIFY two implications implicit in the society. I need to make sure I’m speaking only to the society reflected IN the poem. I’ll make sure to quote the poem itself. by W. H. Auden (To JS/07 M 378 This Marble Monument Is Erected by the State) He was found by the
Premium W. H. Auden The Unknown Citizen Happiness
Service - Our Responsibility Water and Sewerage Authority (WASA) was established by an Act of Parliament in 1965 to manage the water and sewerage sector of Trinidad and Tobago. An essential component of this mandate is the delivery of a safe‚ reliable and efficient water supply to satisfy the demand of all sectors of the economy. Whilst over the ensuing years there has been a steady increase in demand‚ there has not been the commensurate investment in infrastructure and the identification of alternative
Premium Orthography Phoneme