Total Alkalinity and pH of Personal Care Products
Every day we use personal care products like shampoos, soaps, and lotions. We trust that these substances will clean and beautify us without giving us rashes. The scientists who design shampoos and face creams need to make sure their products work without making us break out in hives.
First of all, you need to understand pH. The pH scale is a measurement system designed to show the concentration of H+ ions in a solution. An ion is an atom that has either a positive or negative charge. H stands for the element hydrogen, and because the H has a + next to it, we know it is positively charged. The more H+ ions a substance has, the more acidic it is, and the lower the pH. For instance, lemon juice tastes sourer than orange juice. This is because lemon juice has more H+ ions, making it more acidic. The pH of lemon juice is around 2. Orange juice is also an acidic substance, but less so, because it has less H+ ions and its pH is around 3. Acidic substances all have pH values below 7.
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