CaCl2(aq) + K2CO3(aq) → 2 KCl(aq) + CaCO3(aq)
1.12 g
2.23 g
0.896 g
4.47 g
1.12 g
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Answer:
b) is above pH 7
Explanation:
In the case of titration of a weak acid with a strong base, equivalence point occurs at pH> 7; there is complete salt formation, then the pH is calculated through the salt.
In photograph a, a coil of zinc metal is in a solution of sulfuric acid. In photograph b, a yellow solution of sodium chromate is being added to a colorless solution of silver nitrate. What clues in the photographs indicate that a chemical change is probably occurring.
In photograph a, chemical change is occuring as when a coil of zinc metal is in a solution of sulfuric acid, then the solution starts bubbling, that indicates a chemical change.
In photograph b, a yellow solution of sodium chromate is being added to a colorless solution of silver nitrate, that changes the color of the solution to red , that indicates a chemical change.
Answer:11.35 g/cm 3
Explanation:
Length
= 2.0 dm = 20 cm
Breadth
= 8.0 cm
Height
= 35 mm = 3.5 cm
Volume of block
V = ℓ ⋅ b ⋅ h = 20 cm × 8.0 cm × 3.5 cm = 560 cm
3
Density of lead is
Density
=
Mass
Volume
=
6356 g
560 cm
3
=
11.35 g/cm
3
Explanation: