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- Which of the following is not a strong acid? O HNO3 O H2S04 O HCIO4 O H3PO4 OAll are strong acids.The pH scale for acidity is defined by pH – log10 H*| where |H*| is the concentration of hydrogen ions measured in moles per liter (M). (A) The pH of Drano is 13.3. Calculate the concentration of hydrogen ions in moles per liter (M). [H*] = M (B) The pH of rain water is 5.5. Calculate the concentration of hydrogen ions in moles per liter (M). [H*] = MWhat is standardization in acid-base chemistry? What constitutes a standard in analytical chemistry? Give types and examples.