When aqueous solutions of ____________________ are mixed, a preciptate forms. a NiBr2 and AgNO3 b NaI and KBr c KOH and HCl d Pb(NO3)2 and NaI You have the option to choose more than one
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
When aqueous solutions of ____________________ are mixed, a preciptate forms.
|
a
|
NiBr2 and AgNO3 |
|
b
|
NaI and KBr
|
|
c
|
KOH and HCl |
|
d
|
Pb(NO3)2 and NaI |
You have the option to choose more than one
The reaction of Pb(NO3)2 and NaI is a classic example of a precipitation reaction,
which results in the formation of an insoluble product. In this example, when an
aqueous solution of lead nitrate Pb(NO3)2 is added to an aqueous solution of
potassium iodide KI, a yellow precipitate of lead iodide PbI2 is formed as well as
some potassium nitrate KNO3 which stays in solution.
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