द फोकल लेंथ ऑफ अ कॉनकेव मिरर इज 10 सेंटीमीटर फाइंड द पोटेंशियल ऑफ इमेज ऑफ द ऑब्जेक्ट प्लेसिड अट ए डिस्टेंस ऑफ 10 सेंटीमीटर फ्रॉम द मिरर
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Answer:
Sulfide
A sulfide ion is composed of a lone sulfur atom. Its charge is negative two, giving sulfides this formula: S^2-. Sulfide ions are extremely basic. One well-known ionic compound with a sulfide ion is H_2S. The infamous rotten-egg smell often associated with sulfur originates from this compound. Sulfide compounds are fairly soluble. Many compounds such as PbS, CuS, and HgS are insoluble in acidic and basic solutions. Other such as CoS, FeS, and MnS are only soluble in bases.
Sulfite
Being an ion, sulfite, like sulfide, has a negative charge. However, the distinguishing factor between sulfide and sulfite is their molecular make ups. Besides one sulfur atom, sulfites have three oxygen atoms. This addition causes the creation of bonds in the ion, another feature sulfide ions do not have. However, sulfite and sulfide are similar in ways. Sulfite ions, like sulfide, have a negative two charge. Sulfite ions have this formula: SO_3^2-. Sulfite ions are regularly used as a preservative in wines. They can be found naturally in acid rain, the result of the interactions between water and sulfur dioxide.