pH meter - Always calibrate with pH 4 and 7 buffer, pH - Expresses very low H+ ion concentrations, H3O+  - Hydronium ion, pH 7 - Neutral like water, pH 3 - Has 10x [H+] than pH4, Wine pH - 3 - 4: between 0.001 M and 0.0001 M H+ ions, [H+] = 0.1 M - pH 1, Organic acids - all have -COOH, Carboxylic acids are - Weak acids - partially dissociated, Sulphuric acid - Strong acid - fully dissociated, Buffer - Resists small changes in pH - like wine, Amphoteric - Donate H+ like acid or accept H+ like base,

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