Answer:
TABLE OF CONJUGATE ACID-BASE PAIRS Acid BaseK a (25oC) HClO 4ClO 4 – H 2 SO 4HSO 4 – HCl Cl– HNO 3NO 3 – H 3 O +H 2 O H 2 CrO 4HCrO 4 –1.8 x 10–1
Explanation:
Answer:
H2 + CaCl2 -> 2HCl + Ca
How many grams of HCl are made when 2.93 g of
Ca are made?
Explanation:
From the given balanced chemical equation, it is clear that:
2mol. of HCl and 1mol. of Ca are produced.
2mol. of HCl weighs --- 73.0g
1mol. of Ca weighs --- 40.0g
Hence,
73.0g of HCl and 40.0g of Ca are produced.
When 2.93g of Ca is produced then, how many grams of HCl will be produced?
Hence, 5.35g of HCl is formed.
Milliequivalent is a unit that made from millimol unit multiplied by the valence of the atoms. Calcium has 2 valence electron so the mEq would be twice as much as the mol. The solution has 155meq/liter and the volume is 1850ml. Then, the amount of calcium in the solution should be:
1850ml * (155mEq/1000ml) / (2mEq/mmol)= 143.375mmol= 0.144 mol
Answer:
C
Explanation:
Inn Redox reaction electron transfer takes place between reducing and oxidizing agents. It is not necessary to have oxygen in the reaction, as any chemical species that can undergo electron transfer is enough.
the oxidation and reduction accompany each other, electron lost in oxidation reaction is gained in the reduction reaction.
Hence option C that is In a redox reaction, any increase in the oxidation state of a reactant must be accompanied by a decrease in the oxidation state of a reactant. is correct
