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.
Narrow: Also known as B or N. Only choose if you regularly wear narrow shoes. Medium: Also known as Regular or just R or D. Wide: Known as W, EW, or EE. Extra Wide: Known as either EEEE or XW. Only choose if you regularly wear wider than wide shoes.