Top answers

Chemistry
A Level

Suggest why the concentration of sodium hydroxide in a solution slowly decreases when left open to air

NaOH reacts with carbon dioxide in open air

AK
Answered by Adam K. Chemistry tutor
4465 Views

Why dose sodium oxide have a high melting point?

Sodium oxide has a formula of Na2O. Since sodium is a metal and oxygen is a non metal, sodium oxide is an ionic species. Sodium will lose an electron to form a cation and oxygen will gain 2 ele...

Answered by Chemistry tutor
24220 Views

Explain how a buffer solution resists the pH change when an acid or alkali is added.

HA <----> H+ + OH-Acid:Adding an acid increases the concentration of H+ ions as acids are proton donors. These H+ ions react with the conjugate base, A-, to form HA and thus shift the equilibrium po...

AF
9493 Views

Describe how propenal, propanal and propanone can be distinguished from one another by simple chemical tests.

Propenal can be distinguished by adding bromine water, as it will go from a orange/brown solution to a colourless solution due to electrophilic addition. Propanal can be distingiushed from propanone by us...

NA
Answered by Nathan A. Chemistry tutor
8868 Views

What is the difference between complete and incomplete combustion of a hydrocarbon?

In complete combustion, there is a sufficient supply of oxygen which is able to react with the burning hydrocarbon allowing the reaction products H2O and CO2 to be formed.
In in...

EM
Answered by Ellen M. Chemistry tutor
14284 Views

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