"Hydrochloric Acid" Essays and Research Papers

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James Ruse Chemistry 2011

the quickest in the presence of UV light? (A) (B) (C) (D) Concentrated H2SO4 Cyclohexane 1-hexene 1-hexanol 2. What products would result from the catalytic cracking of a 15-carbon alkane? (A) (B) (C) (D) One alkane and one alkene One alkanoic acid and one alkanol Two alkanes Two alkenes 3. The molar heat of combustion of ethanol is 1367 kJ mol-1. A 2.510 g sample of ethanol was combusted in heating a certain mass of water from 25 oC to 45oC. 80% of the heat released was absorbed by the...

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Chemistry Notes and Worksheet: Acids, Bases and Salt

& Worksheet: Acids, Bases & Salt Name : __________________________________________________ ( ) Class : Secondary 3 Maju/Cemerlang Date : ______ August 2012 Acids Definition: Substances that release hydrogen ions (H+) when dissolved in water. Strong Acids | Weak Acids | Chemical Name | Chemical Formula | Organic acids such as citric acid, ethanoic acid. | Hydrochloric acid | HCl | | Sulphuric acid | H2SO4 | | Nitric acid | HNO3 | | ...

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Reaction between hydrochloric acid and marble

This experiment is to show how much carbon dioxide is produced during the reaction between an acid (hydrochloric acid) and marble. Equipment: Hydrochloric Acid (20ml) - 0.5M, 1M, 2M Marble Chips (2g per test) Large Measuring Cylinder Plastic Bowl (3/4 full of water) Rubber Tubing Glass Conical Flask Stopwatch Method The first thing that we did was fill the plastic bowl with water. We only filled it up 3/4 of the way because otherwise the water displaced into...

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Acids, Bases, and Buffers Lab

Acids, Bases and Buffers Lab Acids, Bases and Buffers Lab Results: The experimental results for part one is as follows: Part One Data Table | Initial pH | Final pH | Test Tube A | 6 | 1 | Test Tube B | 4 | 4 | Test Tube C | 4 | ----- | Test Tube D | 4 | 4 | Test Tube E | 6 | 11 | The experimental results for part two is as follows: Part Two Data Table | Before CO2 was Added | After CO2 was Added | Colour | Blue/green | Light green/yellow | pH Level | 8.0pH | 5.0pH | ...

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Density Practice Problems

of ethanol is 0.789 g/mL. Find the mass of a sample of ethanol that has a volume of 150.0 mL. 6. 30.0 g of each of the following acids are needed. Find the volume of each that must be measured out in a graduated cylinder. A. hydrochloric acid (HCl), density = 1.164 g/mL B. sulfuric acid (H2SO4), density = 1.834 g/mL C. nitric acid (HNO3), density = 1.251 g/mL 7. A rectangular block of lead (Pb) measures 20.0 mm X 30.0 mm X 45.0 mm. If the density of Pb is 11...

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Paper Practical

end point of the reaction by change of colour. For example phenolphthalein and methyl orange are indicators used in acid alkali titrations. Potassium permanganate itself acts as an indicator in potassium permanganate titrations. Acidimetry and Alkalimetry Titration: Acidimentry refers to the titration of alkali with a standard acid and alkalimetry refers to the titration of an acid with a standard alkali. 123 Permanganimetry Titration: The titration involving KMnO4 is called permanganimetry...

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Ka of acid

________________________ Internal Assessment Criteria Aspect 1 Aspect 2 Aspect 3 Total DCP CE Aim: The aim of this practical is to plot and investigate the pH titration curves for the titration of a strong acid with a strong base and of a weak acid with a strong base, and find Ka of the weak acid. Procedure: Part I 1. Pour 30 ml of the HCl solution of unknown concentration in a 100 ml beaker. 2. Add a stirring magnet. 3. Place the beaker on the magnetic heater and activate the rotating motor but not...

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Devry week five chem Ilab

Lacy Taylor iLab, Week #5 UNKNOWN ACID AND BASE TITRATION Introduction The pH, or the concentration of the hydrogen plus ion [H+], is one of the most critical parameters in predicting if a system will corrode, or determining why a system is corroding. PH is defined as the negative log base 10 of the hydrogen plus ion concentration in the units of moles per litre. Procedure pH MEASUREMENT OF UNKNOWN SOLUTIONS Obtain the following apparatus from the equipment menu:  100 mL beaker ...

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Chemistry 104: Analysis of Commercial Antacid Tablets

Commercial Antacid Tablets Hydrochloric acid (HCl) is one of the substances found in gastric juices secreted by the lining of the stomach. HCl is needed by the enzyme pepsin to catalyze the digestion of proteins in the food we eat. Heartburn is a symptom that results when the stomach produces too much acid (hyperacidity). Antacids are bases used to neutralize the acid that causes heartburn. Despite the many commercial brand, almost all antacids act on excess stomach acid by neutralizing it with...

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fdsg

______________ Unit 3 extended investigation Part 1: Gravimetric determination of sulfate in fertiliser Purpose: to find the proportion of sulfate present in a brand of commercial fertiliser. Equipment: 1.0g fertiliser, 3ml 2M Hydrochloric acid solution, 5ml 0.1M silver nitrate solution, 20ml 0.5M barium chloride solution, 200ml distilled ( de-ionised) water, 20ml warm distilled water, 2x 100ml beakers, 600ml beaker, 10ml measuring cylinder, burette and stand, filter funnel, filter...

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