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

Answered by Adam K. Chemistry tutor
4404 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
23531 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...

Answered by Alexander F. Chemistry tutor
9223 Views

What happens during the electrolysis of a molten ionic substance?

A molten ionic substance consists of the ions that make up an ionic compound. During electrolysis these ions, which are contained in the electrolyte solution, are separated through attraction to the two s...

Answered by Jeevan K. Chemistry tutor
5958 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...

Answered by Nathan A. Chemistry tutor
8655 Views

We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences