Being the product of a neutralization reaction between an acid and a base, sodium chloride is neutral, with a pH of seven. Sodium chloride is an ionic compound with the chemical formula NaCl. Continue Reading.
A D-width is considered a medium for men and a wide for women. It measures between 3 and 5 inches across the bottom of the ball of the foot, depending on your shoe size. For instance, in men's footwear, a size 10D is 4 inches across, while a size 14D is 4.5 inches across.
In order of narrowest to widest, the nine shoe widths available in the U.S. are: AAA, AA, A, B, C, D, E, EE, EEE. As such, only the A and E sizes are further divided into sub-sizes. At the narrow end (A), additional letters indicate a narrower width, whereas at the wider end (E), the more letters equals a wider width.