Answer:
A theory is a credible or scientifically acceptable general principle or a set of principles that explain a particular phenomenon while a perspective is a particular way of considering something or a point of view
Explanation:
You do not have to worry because it will not affect the yield of the pure crystals.
<h3>What is re-crystallization?</h3>
Re-crystallization is the process of obtaining pure crystals from a super saturated solution.
This is done by heating a solution of the impure substance to a high temperature and then allowing the hot solution to cool down and the crystals begin to appear.
You do not have to worry about sudden vigorous boiling of crystal solution when you add the second solvent to the solution because it will not affect the yield of the pure crystals.
Learn more about re-crystallization: brainly.com/question/10194206
Answer:
When zinc is added to the solution of iron sulphate, the colour of iron sulphate solution changes. It is because zinc is more reactive than iron, it displaces iron from its solution of iron sulphate and a grey precipitate of iron and a colourless solution of zinc sulphate is formed.
Explanation:
Zn(s) + FeSO4(aq) -----> ZnSO4(aq) + Fe(ppt.)
Answer:
Sample A - mixture
Sample B- Mixture
Explanation:
Looking at sample A, we can see that as water was poured over sample A, the sample was separated into its components as the powder disappeared leaving behind a gritty black sand-like material on the surface of the paper. A separation of the mixture has taken place.
In sample B, we can clearly see that it is a mixture because the amount of solid recovered is much less than the total mass of the solid put into the beaker. The sample must have been separated into its components.
