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Chemistry
GCSE

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
3721 Views

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
24407 Views

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
36253 Views

What are the half equations representing the changes of Pb2+ and Br- in the electrolysis of lead bromide?

Pb2+ + 2e- -> Pb 2Br- -> Br2 + 2e- Lead ions undergo reduction (gain of electrons) at the negative electrode to form solid lead. Bromide ions undergo oxidation (loss of electrons) at the positive el...

Answered by Sophie F. Chemistry tutor
35919 Views

What observations would I expect to make if I dropped from magnesium into some hydrochloric acid? What is the balanced chemical equation?

Effervescence and the magnesium metal would dissolve. Mg + 2HCl --> MgCl2 + H2

Answered by Ollie W. Chemistry tutor
3180 Views

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