Search our library of homework questions

Top answers

All subjects

All levels

Name a test for a C=C double bond

Bromine water:- Turns colourless when mixed with a double bond (unsaturated)- Remains Orange-Brown when mixed with a C-C single bond (saturated)

Answered by Nathan L. • Chemistry tutor

8239 Views

What is an emulsion? and give some examples

Emulsions are solutions of water and oil. With small droplets of one suspended in the other.Common examples of emulsions:- Mayonnaise, Milk (oil droplets in water)- Butter, Margarine (water droplet...

Answered by Nathan L. • Chemistry tutor

19956 Views

How do you make calcium hydroxide (Ca(OH)2) from Calcium carbonate (CaCO3) and what are the equations.

Thermally decompose the calcium carbonate:CaCO₃-> CaO + CO₂Now mix the CaO with water:CaO + H₂O -> Ca(OH)₂

Answered by Nathan L. • Chemistry tutor

23622 Views

Integrate (x^3 - x^2 - 5x + 7) with respect to x.

Remember to integrate you +1 to the power and divide by the new power:(x³⁺¹/3+1) - (x²⁺¹/2+1) - 5(x¹⁺¹/1+1) + 7(x⁰⁺¹/0+1) + CDONT FORGET YOUR CONSTANTx⁴

Answered by Nathan L. • Maths tutor

5701 Views

What is Le Châtelier's principle?

Le Châtelier's principle is that when a system has reached a dynamic equilibrium the position of equilbrium will move to resist any change that is imposed on it.

For exampl...

Answered by Thomas G. • Chemistry tutor

5630 Views