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What is the difference between an endothermic and exothermic reaction? How would you determine if a reaction was endothermic or exothermic using simple lab equipment?

An exothermic reaction is one in which heat is released from the reaction system to its surroundings, causing an increase in temperature. 'Exo' means to give off, heat is expelled in this reaction. An end...

Answered by Annu C. • Chemistry tutor

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Describe the difference between ionic and covalent bonds

Ionic bonds are formed due to the strong electrostatic connection between oppositely charged ions whereas covalent bonds are formed by the sharing of an electron pair between two atoms

Answered by Tanyaradzwa S. • Chemistry tutor

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In a titration, 50 cm3 of sodium hydroxide with a concentration of 0.3 mol/dm3 was neutralised by 60 cm3 of hydrochloric acid. Calculate the concentration of the hydrochloric acid in mol/dm3.

HCl + NaOH = NaCl + H2O. Moles = volume (dm3) x concentration (mol/dm3). Moles of NaOH: volume x concentration = (50/1000) x 0.3 = 0.015 moles. 1 to 1 ratio of HCl to NaOH, so there were 0.015 moles of HC...

Answered by Aarushi V. • Chemistry tutor

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How can Diamond and Graphite both be made of carbon but be so different?

Graphite and Diamond are different because they have different structures. Both have Giant Covalent Structures, resulting in very high melting temperatures. However each carbon atom in Diamond has 4 coval...

Answered by Oghenebrume U. • Chemistry tutor

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