Pure sodium metal explodes when it makes contact with water, and chlorine, in its natural state, is a deadly, poisonous gas. Whe
2 answers:
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Answer:- 64015 J
Solution: The calorimeter contains 4250 mL of water, which is at a temperature of 22.55 degrees Celsius.
The water's density is 1 gram per mL.
Thus, the mass of water = = 4250 grams.
After introducing the hot copper bar, the final temperature of the water reaches 26.15 degrees Celsius.
Thus, for the water = 26.15 - 22.55 = 3.60 degrees Celsius.
The specific heat capacity of water is 4.184 .
To determine the heat absorbed by the water, we can use the following formula:
where q represents heat energy, m refers to mass, and c indicates specific heat.
Now let's substitute the values into the equation to perform the calculations:
q = 64015 J
Therefore, the water absorbs 64015 J of heat.
Answer:
0.31%
Explanation:
For the chemical reaction:
I₂ + 2 S₂O₃²⁻ → 2 I⁻ + S₄O₆²⁻
0.043 L multiplied by 0.117 M of sodium thiosulfate gives 5.031x10⁻³ moles of S₂O₃²⁻
5.031x10⁻³ moles of S₂O₃²⁻ produces:
ClO⁻⁻ + 2 H⁺ + 2 I⁻ → I₂ + Cl⁻ + H2O
2.5156x10⁻³ moles of I₂ equates to moles of NaClO
2.5156x10⁻³ moles of NaClO times yields 0.187 g of NaClO
Thus, the mass percentage composition is:
= 0.31%
I hope this helps!