Question

hey please tell me answers for this please
at least for 4,5 please no spamming ​

Answer 1

Answer:

4. Thermochemistry is concerned with the measurement of the amount of heat evolved or absorbed. The heat (or enthalpy) of neutralization (ΔH) is the heat evolved when an acid and a base react to form a salt plus water. Q in the above equation is -ΔH and is expressed in kJ/mol of water.

5. A universal indicator is a pH indicator made of a solution of several compounds that exhibits several smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions.

Hope this helps u :D

Answer 2

Answer:

1. olfactory indicator is a indicator that tells us about acid and bases by smell.
2. a ph scale is a scale that tells us about the acidic and basic level of a solution.