Mole Calculations in Chemistry
Acknowledgement Learning and Teaching Simple mass-mole conversions; Avogadro constant Teaching calculations in chemistry - a few tips As a generalisation, the more a problem has the left hand characteristics the more straightforward it tends to be.
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Relative Chemical Activity of Some Metals
The purpose of this lab was to become familiar with a method for determining the relative activities of metals as reducing agents. The first experiment tested the reaction of sodium with water. A test tube was filled with water and inverted in a large beaker of water ...
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Mole Ratios Copper and Silver Nitrate
The reaction of copper wire and silver nitrate in aqueous solution provides an interesting display of chemistry in action - delicate silver crystals begin to grow on the wire surface and the color of copper(II) ions gradually appears in solution. What relationships govern the relative quantities of reactants an products in this chemical reaction?
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Chitosan Triggers the Defensive Mechanisms in Plants
Chitosan Oligo Saccharin The natural way to protect your plants against fungus, viruses and nematodes. Improves resistant of roses against black spot (plant fungus on Roses). It is not a fungicide, but protect your plant against fungal diseases and has a high efficiency for organic growers.
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Comparing Acids and Bases
A test tube containing an acid and a test tube containing a base look the same. Scientists use indicators, substances that change color, to distinguish between acids and bases. You have probably heard that acids corrode metals. ...
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An indicator of its time: two millennia of the irongall-nut test
In its time it became an important but controversial method for detecting iron in solution, before being supplanted by more effective reagents. The purpose of this paper is to review the history of the reagent and to show that not only is it an indicator of iron, but also an indicator of the chemical understanding of the times: 'a litmus test' of chemical knowledge. ...
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Mole Ratios in a Chemical Reaction
A balanced chemical equation gives the mole ratios of reactants and products for chemical reactions. If the formulas of all reactants and products are known, it is relatively easy to balance an equation to find out what the mole ratios are. When the formulas of products are not known, experimental measures must be made to determine these ratios.
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Mole Relationships in a Chemical Reaction
Mole Relationships in a Chemical Reaction Chemists can determine the equation for a chemical reaction by identifying the type and amount of the substances involved. The coefficients for the balanced equation can be determined by converting mass values to moles and expressing the mole values in terms of a small whole number ratio.
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Neutralization of a Soft Drink Test
Recall that in a neutralization reaction between an acid and a base, the products will be water and ... In this lab activity, you will neutralize a colorless soft drink using dilute household ammonia. The indicator used to determine when neutralization occurs will be phenolphthalein, often referred to as phth ...
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What is a Mole?
What is a Mole? It's not just a spot on your skin. In Chemistry, a mole is such a large quantity of atoms that it allows the atomic mass of an element to be measured weight (This also allows molecules to be measured in grams).
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