Question

1. Give three examples of evidence that a double displacement reaction has occurred. - A per precipitate u tormed 2. A gas is produced 3. Water or another Slightly tonized ſubstance form 4. slightly lon12ld compound 2. How can you tell ifa precipitate forms when you mix two solutions? - precipitation is formed in a double displacement maachen When two aquenos Solutions react they form one aqueoul compound and aloud 3. Balance the following conventional equation: (KCH) 3_CaCl + Cay(PO3)2 + 2. K PO.() → 4. Correct the mistakes in the following chemical formulas: a. NaCl, NaCl b, BaOH, 64 Col). 6, 2K50, K, 504 2k² + 1504"

Answer 1

Date : Page No. : three empto examples. w Neutralization reaction : Acid + Base react to form salt & water Helt Naon Nach + H₂O (Acid) (Base) (salt) (water) Precipitation reaction : AgNO₃ + Nall Age + NaNO₃ (aq) (aq) (ppt) (aq) as formation : Na₂S + 2HCl → 2 Nad + H₂S gas)

When two solutions are mixed if a solid is formed at the bottom of the test tube we can say that it is precipitation reactions The precipitate is insoluble in water and is clearly visible at the retow end of a reaction The precipitate is always in solid phase Example: AgNO + Nad Agcht Nano, ag) coa) e (s) san agd precipitate 3. 3 Cact + 2 K₂ Poy > Caz (PO4)2 + 6kci w You have sored correctly Nach Nat, ce Ba(OH)2 Nons Ba2+, OH O Noor K₂SO4 Kt, so, 2-