In nutrition, certain foods have an acidic effect on the body after consumption, and certain foods have an alkaline effect. Plant foods, such as ginger, are the most alkaline-promoting foods. Ginger has a pH of 5.6 to 5.9, similar to that of figs, fennel, leeks, parsnips and romaine lettuce.
The reaction between aluminum and bromine is very exothermic (DH o = -1022 kJ). This drives the entire process, and energy is given off in the form of light and heat: 2 Al (s) + 3 Br 2 (l) --> 2 AlBr 3 (s) The product of this reaction is a molecular solid with the formula Al 2 Br 6, but the formula is often written as AlBr 3.
The chemical reactivity of benzene contrasts with that of the alkenes in that substitution reactions occur in preference to addition reactions, as illustrated in the following diagram (some comparable reactions of cyclohexene are shown in the green box).. A two-step mechanism has been proposed for these electrophilic substitution reactions. In the first, slow or rate-determining, step the electrophile forms a sigma-bond to the benzene ring, generating a positively charged benzenonium intermediate.