Answer: -
H₂Se + 2 LiOH → Li₂Se + 2 H₂O
Explanation: -
Acid given = H₂Se
Base given = LiOH
We know that in a neutralization reaction,
Acid + base = salt + water
Formula of water = H₂O
Formula of salt = Li₂Se
Thus the balanced chemical equation for the neutralization reaction is
H₂Se + 2 LiOH → Li₂Se + 2 H₂O
Answer:
They are used because of preference or convenience, not necessity. These scales came about historically when there were no standards to calibrate a thermometer against. The Fahrenheit scale used the temperature of the coldest thing then known for its zero, which was salty ice.13-Oct-2019
Answer: option D) energy was absorbed and entropy increased.
Explanation:
1) Given balanced equation:
2H₂O (l) + 571.6 kJ → 2 H₂ (g) + O₂(g).
2) Being the energy placed on the side of the reactants means that the energy is used (consumed or absorbed). This is an endothermic reaction.
So, the first part is that energy was absorbed.
3) As for the entropy, it is a measure of the disorder or radomness of the system.
Since, two molecules of liquid water were transformed into three molecules of gas, i.e. more molecules and more kinetic energy, therefore the new state has a greater degree of radomness, is more disordered, and you conclude that the entropy increased.
With that, you have shown that the right option is D) energy was absorbed and increased.
Q3.) acidic
q4.)that the solution is acidic
q5.)that the solution is alkaline
