01. Some chemicals are acids and some are bases. We can test these chemicals with different Indicators and determine if they are an acid or a base. Cabbage juice is an example of an acid-base Indicator. If a solution of lemon juice is poured into purple cabbage juice, it will turn red. This indicates that it is an acid. If drain cleaner is added to cabbage juice, it will
turn green indicating that it is a base.
Red
Purple
Green
base
er
Other materials can also be used as indicators if they change color in the presence of an acid or base. Litmus paper and phenolphthalein are commonly used in a chemistry lab but
many other plant materials such as beets, blackberries and blueberries will also work
A student was given an unknown liquid. She tested it and recorded the following observations
Uus per
Reaction w
Bu
Based on the Information above, what color would this liquid most likely turn using a cabbage juice indicator?

k

explanation:

k

well in order to answer this question you have to provide more information < 3

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :