write the reaction of acids with metal,metal oxides, non metal
plz Anwer I will mark for sure
Answers
Answer:
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Answer:
Acids have pH values below 7. The lower the pH value, the more strongly acidic the substance.
Bases have pH values above 7. The higher the pH value, the more strongly basic the substance.
Neutral substances have pH equal to 7.
Another useful thing we learnt in the previous chapter is that we can use universal indicator to measure the pH of a solution. Universal indicator has different colours at different pH values. Below is a colour chart showing the range of colours for universal indicator and the pH values they correspond to. You will need it for all the activities of this chapter, because we are going to do lots of pH measurements!
Can you remember how we used the universal indicator paper in the previous chapter? Here are some suggestions for the investigations of this chapter:
Before you start, place 1-cm lengths of universal indicator paper on a sheet of white paper, like this:
Later, if you want to write down a note or an observation, you can do so directly on the paper and copy it to your workbook afterwards.
Instead of dipping the paper in the solutions you are testing, use a glass rod or drinking straw to transfer a drop of the test solution to the indicator paper.