What does 7 represent on the PH scale?

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What is the range of the Ph scale? How do you measure the PH of a solution? What numbers are alkalis on the PH scale? what numbers are acids on the PH scale? whats the difference between a strong acid and a concentrated acid? What does acid strength tell you? What do acids and metal carbonates produce? Whats the difference between a strong or weak acid? What substances can be formed when nitric acid is mixed with copper hydroxide? How can you produce solid silver from silver nitrate solution? What order does the reactivity series list metals in? What is the meniscus of a liquid? Do you measure a liquid from the top or the bottom of the meniscus? How are solids Measured? How do you measure the PH of a solution? What is a universal indicator? What is litmus paper? What colours will litmus paper change to? What does it mean if the litmus paper turns blue? What does it mean if the litmus paper turns red? What colour will litmus paper turn in an acid? What colour will litmus paper turn in an alkali? What is universal indicator paper? How does universal indicator paper work? What does universal indicator do to show the ph value of a solution? What is a water bath? What is produced when lithium reacts with water? Why does lithium and water reacting produce an alkali? What is the difference between propene and propane? How can you test to see if a substance is propene or propane?