Before beginning this experiment in the laboratory you should be able to answer

Question

Before beginning this experiment in the laboratory you should be able to answer the following questions. Before you can write a chemical equation, what most you know? what observations might you make that suggest that a chemical reaction has occurred? How could you distinguish between NH_4 CI and AgCI? Define metathesis reactions. Give an example. what is a precipitate? Balance these equations: KBrO_3 (s) rightarrrow KBr(s) + O_2 (g) MnBr_2 (aq) + AgNO_3 (aq) rightarrrow Mn(NO_3)_2 (aq) + AgBr(s) How could you distinguish between the gases H_2 and NO_2?

Explanation / Answer

Q1.

you must know:

- Reactants

- Products

- Conditions

- States/phases

- Ratios

Q2.

gas formation, change in color, precipitate, change in temperature

Q3

NH4Cl --> when adding NaOH --> NH3(g) will be formed

when adding AgCl --> will precipitate in acidic conditions

Q4.

metathesis reaciotns -->reacitons in which Species exchange cations/anions to form new compounds

Q5

preicpitate is any specie which is formed in solid state

Q6

KBrO3 -->KBr + O2

balance O

KBrO3 -->KBr + 3/2O2

for

MnBr2 + 2AgNO3 --> Mn(NO3)2 + 2AgBr

Q7

H2 are flammable

NO2 i snot flammable, it has red/pungent odor

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