Science Essays

Vinegar is an ethanoic acid. A wholesaler supplies chip shops. Design an investigation which identifies which chip shops are watering down the vinegar. Background Theory All acids contain the element “hydrogen”. Water ionises the hydrogen to make it H+. To react all acids have to be ionised. Strong acids are …

In this plan I shall demonstrate that sulphuric acid is dibasic. In order to do this affectively I will plan experiment using scientific techniques. The experiment will involve titration. I will then validate these experiments using calculations and appropriate chemistry knowledge. The reactants I have selected that will neutralise sulphuric …

Abstract The main objective of this experiment was to find the mole to mole ratio of is NaHCO3(s), or sodium bicarbonate, to NaCl, or sodium chloride when it is reacted with excess hydrochloric acid. The result of this was a 1 to 1 ratioThe other main objective, which was similar …

Milk of Magnesia (Magnesium hydroxide mixture) is a mildly basic mixture, which is commonly used in the treatment of constipation and indigestion, because it neutralises excess acid it is called an antacid. Magnesium hydroxide draws water into the colon by osmosis and induces peristalsis and is therefore also known as …

Over the span of hundreds of years science has advanced tremendously improving our understanding of what makes up the world we live in. The atom is one of sciences important findings and has had a changing history of new discoveries, always altering the way we see things. In the early …

Hypothesis: If solution of compound and water has high conductivity level, compound is ionic. If compound dissolves in water quickly, it is ionic. If compound takes a long time to melt (high bp), it is ionic. If compound is crystalline, it is ionic. If solution of compound and water has …

Early in the 19th century, scientists worked with the basic principles of electrophoresis. Scientists measured the behaviour and properties of small ions moving through solutions in an electric field. In the 1930’s, Arne Tiselius developed the “Tiselius apparatus” for separating protein molecules through electrophoresis. By the 1960’s, many different gel …

To find the molarity of the unknown acid, first we had to create a standard solution, the solution we created was Sodium Hydroxide (NaOH). We wanted a 0.1 molar solution of sodium hydroxide so to get this we had to dissolve 4g of NaOH into 1000cm³ of water, but we …

Aim: To make an accurate Sodium Hydroxide solution ready for titration. Apparatus: Sodium Hydroxide pellets, Pipette, Distilled water, Volumetric Flask, Spatula, Weighing scale, Goggles. NaOH: 23+16+1=40g. 40g NaOH in 1 litre (1000ml) 10g in 250ml 1g in 250ml 0.1 molar Method: Firstly we weighed out exactly 1 gram of the …

Primary standards, such as potassium hydrogen phthalate (KHP) (C8H5KO4), display unique characteristics such as high purity, maintain stability during storage within a long period of time whether in solid or liquid form, large molar mass as calculated to be 204 (RMM), low reactivity with the surrounding air, high stoichiometry and …