Acids and Bases Essay

Acids And Bases Term paper

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Acids and Bases
What substances turned into Acids? & What substances turned into Bases? Hypothesis: Procedure: Pour about three milliliters of your sample in each of three test tubes. ...
·        ;When a substance dissolves in water, it forms an aqueous solution, which may be acidic, alkaline or neutral.

 

·        ;Metal oxides dissolve to form alkaline solutions.

·        ;Non-metal oxides dissolve to form acidic solutions.

 

·        ;The pH scale is used to show how acidic or alkaline a substance is. It runs from 0 (being highly acidic) to 14 (being highly alkaline).

 

·        ;Indicators are used to show whether a solution is acidic, alkaline or neutral

Acids And Bases
What substances turned into Acids? & What substances turned into Bases? Hypothesis: Procedure: Pour about three milliliters of your sample in each of three test tubes. ...
by the way their colours change. Some common indicators are: Universal Indicator, Litmus, Methyl Orange and Phenolphthalein.

 

·        ;A base is a substance that neutralises an acid. An alkali is a soluble base. (All alkalis are bases, but not all bases are alkalis)

 

·        ;All acids contain hydrogen ions, H+ in solution.

·        ;All alkalis contain hydroxide ions, OH in solution.

 

·        ;An acid is a proton donor, a base is a proton acceptor.

 

·        ;An

Acids and Bases
·        ;When a substance dissolves in water, it forms an aqueous solution, which may be acidic, alkaline or neutral.   ·        ;Metal oxides dissolve to form alkaline solutions. ·        ...
acid reacts with an alkali to produce a salt and water. This type of reaction is called a neutralisation reaction.

The hydrogen ions react with the hydroxide ions to form water.

 

H+ (aq) + OH (aq) H2O (l)

 

Some general reactions of acids

 

1.       ;Acid + Base

Neutralizing Acids And Bases-
Neutralizing Acids and Bases- The sought to determine the effects of mixing various levels of acids and bases to see which combination would have the most explosive reaction, ...
Salt + Water

2.     ;Acid + Carbonate Salt + Water + Carbon Dioxide

3.     ;Acid + Metal Salt + Hydrogen

Neutralizing Acids and Bases
The sought to determine the effects of mixing various levels of acids and bases to see which combination would have the most explosive reaction, and measure the resulting pH levels. ...

 

N.B. Metals below hydrogen in the reactivity series (copper, silver, gold) will not react with acids.

 

·        ;Reactions involving hydrochloric acid produce chlorides.

·        ;Reactions involving sulphuric acid produce sulphates.

·        ;Reactions involving nitric acid produce nitrates.

Strong and Weak Acids

·        ;A strong acid or alkali is one which is completely ionised in water. E.g. hydrochloric acid (HCl) or sodium hydroxide (NaOH)

 

·        ;A weak acid or alkali is one which is partially ionised

09 - Acids and Bases
9.1 Properties of acids and bases 9.1.1 : Properties of acids and bases in aqueous solutions on stuff...nb...the term alkali refers to a base dissolved in water. ...
in water. E.g. ethanoic acid (CH3COOH) or ammonia (NH3)

 

Salt Preparation

The following methods may be used to prepare a soluble salt:

1.       ;Acid + Base, Acid + Metal, Acid + Carbonate

 

Brief Method: Add excess solid (base, metal or carbonate) to some acid. Filter off the solid. Evaporate the remaining solution to half volume and leave to crystallise for a few days.

 

2.     ;Acid + Alkali

 

Brief Method: Measure accurately, using a pipette, some alkali

Acid/Base Titration
Titration of an Acid with a Base Jeff Barker Chem. A-1 Wednesday, May 17, 2000 Introduction: When you combine strong acids and bases, perfect ionization is ...
(e.g. 25cm3). Add an indicator (usually phenolphthalein). Add acid from a burette until the indicator changes colour. Record your result. Repeat, more accurately (drop by drop near end) until two results are within 0.1cm3 of each other. Then repeat without indicator adding the same volume of acid as your accurate result. Evaporate the resulting solution to half volume and leave to crystallise for a few days. This method is known as titration.

 

·        ;To prepare an insoluble salt: Mix

Acid-Base Titration
Chemistry Acid-Base Titration Purpose: The objective of this experiment were: a) to review the concept of simple acid-base reactions ;b) to review the stoichiometric calculations involved in chemical reactions ...
two solutions of
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