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aleksandrvk [35]
3 years ago
11

2. The term for a reaction where two solutions are mixed and an insoluble substance forms is called a _____ reaction.

Chemistry
1 answer:
Norma-Jean [14]3 years ago
8 0

Answer:

precipitation reaction.

Explanation:

an insoluble substance is called a precipitate, so the reaction is a precipitation reaction.

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How many milliliters of water at 23 °C with a density of 1.00 g/mL must be mixed with 180 mL (about 6 oz) of coffee at 95 °C so
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Answer:

V H2O = 170.270 mL

Explanation:

  • QH2O ( heat gained) = Qcoffe ( heat ceded)

⇒ Q = m<em>C</em>ΔT

∴ m: mass (g)

∴ <em>C</em>:<em> </em>specific heat

assuming:

  • δ H2O = δ Coffe = 1.00 g/mL
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⇒ Q coffe = (mcoffe)(C coffe)(60 - 95)

∴ m coffe = (180mL)(1.00 g/mL) = 180 g coffe

⇒ Q  = (180g)(4.186 J/°C.g)(-35°C) = - 26371.8 J

⇒ Q H2O = 26371.8 J = (m)(4.186 J/°C.g)(60 - 23)

⇒ (26371.8 J)/(154.882 J/g) = m H2O

⇒ m H2O = 170.270 g

⇒ V H2O = (170.270 g)(mL/1.00g) = 170.270 mL

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ycow [4]

Answer:

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Redox reactions - Higher

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reduction is gain of electrons

Rusting is a complex process. The example below show why both water and oxygen are needed for rusting to occur. They are interesting examples of oxidation, reduction and the use of half equations:

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iron(II) ions lose electrons and are oxidised to iron(III) ions by oxygen: 2Fe2+ + ½O2 → 2Fe3+ + O2-

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