1. what is the oxidation number of the indicated species in the following compou
ID: 505599 • Letter: 1
Question
1. what is the oxidation number of the indicated species in the following compounds? sodium in Na2S, Fluorine in F2, Sulfur in H2SO3, Oxygen in H2O, Sulfur in SO3, Hydrogen in Ca(OH)2.
2. Identify the difference species in the following chemical equation: Zn+2Ag-Zn2+2Ag.
Oxidized species,
Reduced species
Oxidizing and Reducing agents.
3. Derive the total ionic equation between potassium sulfate and calcium nitrate?
4. How many grams of calcium sulfate will form from the reaction of 50ml of 0.15M potassium sulfate solution with excess calcium nitrate?
5. Classify the following processes as exothermic or endorthermic..
freezing of water
sublimation of CO2
6. What is the specific heat capacity of a metal rod that weighs 450 g and increases it's temperature from 25 degree Celsius to 75 degree Celsius when 250 J of heat are transferred to it?
Explanation / Answer
1)
Na2S
2 * x + (-2) = 0
2x = 2
x = 1 Answer
F2
2x = 0
x = 0 Answer
H2SO3
2 (+1) + x + 3 (-2) = 0
x = 4 Answer
H2O
2(+1) + x = 0
x = -2 Answer
SO3
x + 3 (-2) = 0
x = +6 Answer
Ca(OH)2
+2 + 2 ( -2 + x) = 0
2 ( -2 + x) = - 2
-2 + x = - 1
x = +1 answer
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