Question
A student investigated the reactivity of four different metals, A, B, C and D. The student added each metal to aqueous solutions of each of the metal sulfates observed whether a reaction look place. Give one observation that would show a reaction took place.
Answer
4.3
(300 Votes)
Molly
Veteran · Tutor for 9 years
Answer
Observation indicative of a chemical reaction is exhibiting the formation of a precipitate in solution or distinct spectral changes in color of the solution.
Explanation
## Step 1: Understand the Basics of the QuestionThe question prompts the student to understand the nature of reactivity in metals in terms of the reactions when these metals are added in aqueous solutions of each of the corresponding metal sulfates. Specifically, it wants the student to cite one observation that would signify that a reaction had transpired.## Step 2: Understanding Metal Reactivity When metals react with metallic sulfates, due to their offset in reactivity, a metal that's more reactive will degrade and deposit less reactive metal from its sulfate solution. There will be progress of visible reactions such as formation of different precipitating material which has varying colors and techniques dependent on the nature of the reacting substances. ## Step 3: Observation Indicating a Reaction· A visual view of effervescent gas· Migration of electrons or energy releasing process triggering emission of light (exceptionally if reactions are done conclusively)· Appearance of a new color in the solution different from the initial one · Formation of a precipitate (a solid material formed)· Energy exchanged such as noticeable changes in temperature for a certain point could possibly lead to more extreme transformations such as exothermic reactions producing considerable warms.However, of these, formation of precipitate or change in color are frequent oxidation-reduction (redox) reactions observed when metals are reacted with their respective metal sulfate solutions. **Important to Notice**: Share exact reaction differences explaining requirement only demands one reaction revealing symptoms.