EXAMPLE 1 â Predicting Precipitation Reactions: Predict whether a precipitate will form when water solutions of silver nitrate, AgNO 3 (aq), and sodium sulfide, Na 2 S(aq), are mixed. If there is a precipitation reaction, write the complete and net ionic equation that describes the reaction. he following is a typical problem. Predict whether a precipitate will form when water solutions of silver nitrate, AgNO 3 (aq), and sodium sulfide, Na 2 S(aq), are mixed. If there is a precipitation reaction, write the complete and net ionic equation that describes the reaction.
Symptoms include: itching, burning, redness and swelling. Treatment may include antibiotic or anti-allergy eye drops. Contact lens rewetting and eye surface lubrication. If your eyes sometimes feel dry wearing contact lenses, choose eye drops specifically intended for use with contacts. Other drops could discolour your contacts or temporarily change their fit.
There are extended-wear contacts, disposables, and even lenses that can change your eye color. But as with any purchase of a medical device, buying contact lenses should be done with care and caution. These tips will help you choose the right type of contact lens for your needs. Contact Lens Options.Your first step is to choose from two basic types of lenses: soft and hard.I recommend that people not wear contacts overnight, even if they are extended-wear lenses,â says Dr. Steinemann. When you sleep with your contact lenses in, you reduce the amount of oxygen to the eyes, making your eyes more vulnerable to infection â especially corneal infection. Disposable contact lenses.