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6. Acids that only partly ionise in water are called 'strong acids'
7. Solutions of weak acids have higher pH values and react more slowly than solutions of strong acids with the same concentration
8. Alkalis are soluble bases that produce hydroxide ions OH+ in solution
9. In aqeous solutions strong alkalis are not completely ionised
10. Weak alkalis ionise completely ionise in aqeous solution
11. Solutions of weak alkalis have lower pH values than solutions of strong alkalis with the same concentration
12. Bases react with protons, and are called 'proton donors'