Write a complete, balanced equation for this double displacement reaction between sodium hydroxide and nickel(ii) chloride. (hint: the solid is a compound of ni2+ ions and hydroxide ions.) write the complete molecular equation rather than the net ionic equation.

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Chemical formula of sodium hydroxide = NaOH

Chemical formula of Nickel (II) Chloride = NiCl₂

The product is a solid compound of Ni²⁺ ions and hydroxide ions.

So the compound formed is Nickel (II) Hydroxide.

Chemical formula of Nickel (II) Hydroxide = Ni(OH)₂.

Since a double displacement reaction occurs, the other product should be NaCl.

The balanced chemical molecular equation for the reaction is thus

NiCl₂ + NaOH → Ni(OH)₂ + NaCl.

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"