For the silver nitrate test, the solution is added first with nitric acid. This test is to determine halide ions. When silver nitrate is added to the solution, the color of the precipitate would indicate the identity of the ion. For chloride ions, the precipitate is white.
For the sodium thiosulfate test, chlorine is treated with Ki solution which turns brown. When it is titrated with sodium thiosulfate solution, the brown turns yellow upon which, starch is added. It forms a complex which appears as dark blue. Upon adding more titrant, it reaches the endpoint where the blue turns colorless.
Answer:
D. Using the new pesticide produces bigger tomatoes than using the
old pesticide.
Explanation:
This hypothesis is best to test for the effect of the new pesticide on the tomato plant.
A pesticide is chemical formulation used to kill pests of farm crops.
Pests prevents the healthy and proper growth of plants thereby resulting in poor yield on the farm.
For the farmer to ascertain the effect of the pesticide on his farm crop, he must compare the yield of his produce. Some tomato might grow well but would not bear good fruit. If the farmer focuses on the fruit produced, he would have derieved a good hypothesis in his experiment.
The first option would be correct.
It contains 1 single element.
Hope this helps! (:
Answer:
Boiling stones and stir bars serve to help the liquid to boil more calmly <em>avoiding it to become superheated or bumping and with this preventing accidents, projection of dangerous liquids or burns.</em>
I hope you find this information useful and interesting! Good luck!
Answer:
1. H-O-H H-H
Explanation:
1. A water molecule is one oxygen connected to two hydrogen atoms, while a hydrogen molecule is two hydrogen atoms connected to each other.
