Notes. 1  For a quick gluten-free gravy, while the roast is cooking, heat 2 Tbsp of butter/fat in a sauce pan. 2  If you are making the roast ahead of time, it is a great idea to use the broth left in the roasting pan to make this gravy as directed above. 3  Stretch this meal by braising extra root veggies on the side.
The remaining part of the original water molecule is called a hydroxide ion (negative charge because it kept an extra electron, shorthand = OH-). Although present at very low levels in solution, H+ and OH- ions can have enormous effects on the properties of a solution, especially when they are not in balance. In pure water, every hydroxide ion that forms creates a hydrogen ion, so there are equal numbers of anions and cations.
Since removing H + ions from water molecules is one way to increase the OH-ion concentration in a solution, metal hydrides are bases. A similar pattern can be found in the chemistry of the oxides formed by metals and nonmetals. Nonmetal oxides dissolve in water to form acids. CO 2 dissolves in water to give carbonic acid, SO 3 gives sulfuric acid, and P 4 O 10 reacts with water to give phosphoric acid. Metal oxides, on the other hand, are bases. Metal oxides formally contain the O 2- ion, which reacts with water to give a pair of OH-ions.