Question
Copper oxide reacts with sulfuric acid to make copper sulfate. The diagram below shows the compounds involved. You can tell a reaction has happened because there is a change of __ What one word completes this sentence? Enter your answer copper sulfate and water
Answer
4.1
(353 Votes)
Elspeth
Elite · Tutor for 8 years
Answer
Colour
Explanation
## Step1:To answer this question, we need to understand the concept of a general chemical reaction. A chemical reaction occurs when there is a transformation from some set of chemical substances, known as reactants, to another set of chemical substances, known as products. ## Step2:The sentence poses a gap for us to fill, mentioning that a reaction has occurred, as there is a change of '...'. ## Step3:Let's think about a visible change in a reaction. Numerous signs could indicate a chemical reaction, but the vantage point of the sentence and the situation it presents point us towards 'colour'.### When Copper oxide and sulfuric acid react with each other, they form copper sulfate, which has a blue color, highlighting a clear change 'color'. Notably, copper oxide is black and sulfuric acid is colourless.