When NaCl solution is dissolved in water‚ the solution conducts very well‚ because the solution contains ions. The ions come from the table salt‚ whose chemical name is sodium chloride. Sodium chloride contains sodium ions‚ which have a positive charge‚ and chloride ions‚ which have a negative charge. Because sodium chloride is made up of ions‚ it is called an ionic substance. After completing the experiment and plotting each conductivity value I found that as the NaCl increased in concentration and
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Unit 18 B Study Guide 1. Find the solubility (in mol/L) of lead(II) chloride (PbCl2) at 25oC. Ksp = 1.62e–5. A) 1.59e–2 B) 2.53e–2 C) 6.64e–17 D) 2.01e–3 E) 2.01e–2 2. The two salts AgX and AgY have very similar solubilities in water. It is known that the salt AgX is much more soluble in acid than is AgY. What can be said about the relative strengths of the acids HX and HY? A) Nothing. B) HY is stronger than HX. C) HX is stronger than HY. D) The acids have equal strengths. E)
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sodium chloride‚ and the hydrochloric acid. 6. If you were to spend a lot of time studying nerve physiology in the laboratory‚ what type of stimulus would you use and why? I would use the glass rod because I would like to see what the results might be if you froze the glass rod instead of heating it. 7. Why does the addition of sodium chloride elicit an action potential? Hint: Think about the sodium permeability of the neuron (Figure 3.2e). Because of the addition of chloride. Inhibiting
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temperature may be lower if super cooling occurs or if there are impurities present in the water which could cause freezing point depression to occur. Sodium chloride‚ also known as salt‚ common salt‚ table salt or halite‚ is an ionic compound with the formula NaCl‚ representing equal proportions of sodium and chlorine. Sodium chloride is the salt most responsible for the salinity of the ocean and of the extracellular fluid of many multicellular organisms. As the major ingredient in edible salt
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SINGAPORE POLYTECHNIC SCHOOL OF CHEMICAL & LIFE SCIENCES CP 4001: ANALYTICAL & PHYSICAL CHEMISTRY Experiment 4: Gravimetric Analysis Prepared for: Mr Goh Tong Hng Submitted by: Ng Hui Shan (0900931) DBS/FT/1A/02 26th May 2009 CONTENTS 1. Synopsis 3 2. Objectives 4 3. Theory 1. Experimental Procedure 4 2. Stoichiometric Calculation 7 4. Procedure 7 5. Results & calculations 1. Amount of
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Date Performed: July 30‚ 2012 EXPERIMENT NO. 10 COMPOSITION OF POTASSIUM CHLORIDE ABSTRACT The aim of the experiment was to look for the percentage composition of the elements present in the decomposition of potassium chlorate (KClO3) and to find out what the residue after heating was. After performing the experiment the researchers found out that there were about 66.14% of potassium chloride (KCl) in KClO3‚ and they also deducted that the residue was actually KCl. _____________________
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bromine are both non-metals (both negative in compounds) and both are used for disinfecting and bleaching. What will happen if chlorine is added to a solution containing bromide ions? What will happen if bromine is added to a solution containing chloride ions? Permanganate ions (MnO4-) react with iron(II) ions (Fe2+) in acid solution. What about the ratio in which these ions react? Does the balanced equation
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Previously‚ Yeoh‚ & Wong (1993) reported the nutritional values of A. gangetica. Ogle et al.‚ 2001 reported the folate composition of A. gangetica. However‚ not much information on the utility of this leafy vegetable has been reported. To the best of our knowledge‚ there is no report on the optimization of polyphenols and their radical scavenging activities from the edible leaves of A. gangetica. Therefore‚ the main aim of this study is to optimize extraction conditions such as EtOH concentration
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Name SOLUBILITY CURVES Answer the following questions based on the solubility curve below. Which salt is least soluble in water .. at 2O° C? 2. How many grams of potassium chloride can be dissolved in 200 g of water at 80° C? IO 3. At 40° C‚ how much potassium _ __nitrate coin be dissoiu$tl ^n 30D.g of water? ------W- ’1 80 70 ...- O --60 0 5© 40 4. Which salt shows the least change 30 In solubility from 0° - 100° C? 20 10 At 30° C‚ 90 g of sodium
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is standardized with a solution of a known conductivity. The ratio of a measured conductivity toward the standard solution is the ratio of length(l) towards cross section (A) of the cell. This ratio cell is call the cell constant. Use potassium chloride with a known conductivity as a standard solution. The conductivity measurements are not appropriate to compare between two electrolyte solutions because of the high dependant towards solution concentration. The molar conductivity (Λm) measurements
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