Neutralisation

Question 1

Generalised definition of neutralisation

Answer 1

Neutralisation is a reaction between an acid(H+ ion) and a base(OH-) to produce a neutral solution. UI turns a hot colour if the solution is acidic, a cool colour if neutral, and green if neutral. The products are a neutral ionic salt called — chloride, water, and sometimes CO2

Question 2

Prior Observations for Neutralisation

Answer 2

UI turns a hot colour if the solution is acidic, a cool colour if neutral, and green if neutral. Products produced with a PH7.

CO2 (bubbly gas) turns lime water cloudy if present

Salt is soluble in water so it disolves in the presence of water.

Question 3

Characteristics of Acids

Answer 3

Acids contain more H+ ions than OH- ions, meaning they want to give away H+. They turn UI red and turn litmus red as they are acidic. They have a sour taste and will disociate in water.

Question 4

Characteristics of Bases

Answer 4

Bases contain more OH- ions than H+ ions, meaning they want to recieve H+ they turn UI Purple, litmus blue and phenolpthalein pink as they are basic. They have a soapy feeling. Alkali are water soluble, weak bases that produce Hydroxide (OH-)

Question 5

How is mass conserved in Neutralisation

Answer 5

A balanced equation shows that mass is conserved because the number and type of atoms in both the reactants and products are the same since mass cannot be gained ot lost by itself, the atoms determine the mass and no atoms have been intorduced or lost in the reaction. All atoms/elements/ ions in the products can be traced back to the reactants. The total mass of products is equal to the total mass of reactants. The reactants and products both have the same number of each type of element. If CO2 is produced then it will escape and the mass may appear unbalanced
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