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Rudik [331]
3 years ago
6

When magnesium ribbon is placed in sulfuric acid, a chemical reaction takes place and heat energy is given off. Liang and Naraba

atar are planning an investigation into the effect of the length of magnesium ribbon on the increase in temperature. They decide to carry out some preliminary work.
Explain what preliminary work they could do and how this would help them plan their investigation.

please give a genuine aswer ​
Chemistry
1 answer:
kolezko [41]3 years ago
6 0

Answer:

this is the answer

I hope it helps you although

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You work for a cutlery manufacturer who wants to electrolytically precipitate 0.500 g of silver onto each piece of a batch of 25
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Answer:

373.1 mL of AgCN (aq) must be poured into your electrolysis vat to ensure you have sufficient Ag to plate all of the forks.

Explanation:

Mass of silver to be precipitated on ecah spoon = 0.500 g

Number of silver spoons = 250

Total mass of silver = 250 × 0.500 g = 125 g

Moles (n)=Molarity(M)\times Volume (L)

Moles of AgCN = n  = \frac{125 g}{134 g/mol}=0.9328 mol

Volume of AgCN solution =V

Molarity of the AgCN = 2.50 M

V=\frac{0.9328 mol}{2.50 M}=0.3731 L=373.1 mL

(1 L = 1000 mL)

373.1 mL of AgCN (aq) must be poured into your electrolysis vat to ensure you have sufficient Ag to plate all of the forks.

6 0
3 years ago
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Temka [501]

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As a chemical reaction occurs, the thermometer in the container records a drop in temperature. What is true of the reaction?
nadya68 [22]
<span>When a chemical reaction occurs and the thermometer in the container records a drop in temperature t</span>he reaction is exothermic because heat was released by the reaction.

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