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3 years ago

Balance this equation: Al+ HNO3 ---- H2 + Al(NO3)3

Chemistry

1 answer:

romanna [79]3 years ago

6 0

Answer:

2Al+ 6HNO3 ---- 3H2 + 2Al(NO3)3

Explanation:

Put coefficient a,b,c, and d for calculation:

a Al + b HNO3 = c H2 + d Al(NO3)3

for Al: a = d

for H: b = 2c

for N: b = 3d

for O: 3b = 9d

Suppose a=1, then d=1, b=3, c=3/2

multiply 2 to make all natural number, a=2, then b=6, c=3, d=2

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Hence, moles of NaOH in 97 ml = $\frac{0.1090 \times 97}{1000}$

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$\frac{6.247 \times 10^{-3}}{3}$

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$2.082 \times 10^{-3} mol \times 40 g/mol$

= $83.293 \times 10^{-3}$ g

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Therefore, 40 g NaOH = 122 g benzoic acid

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$\frac{0.253 g}{0.3471 g} \times 100$

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a) 7.0.

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The name of the salt (NiSO₄.7H₂O) is Nickel sulfate hepta hydrate.

c) What is the molar mass of the hydrate?

(NiSO₄.7H₂O)

The molar mass = molar mass of NiSO₄ + 7(molar mass of H₂O) = (154.75 g/mol) + 7(18.0 g/mol) = 280.83 g/mol.

d) What is the mass % of water in the hydrate?

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Balance this equation: Al+ HNO3 ---- H2 + Al(NO3)3​

Balance this equation: Al+ HNO3 ---- H2 + Al(NO3)3