There are three things you can do to dissolve the salt in water:
1) Stir the solution - you increase the rate at which water molecules will come in contact with the salt crystals
2) Grind the salt - the surface area of the salt will increase thus the contact area between ionic lattice of the crystal that can interact with water, is bigger
3) Increase the temperature - this will increase even more the rate of the solvation by increasing the kinetic energy of the particles
Answer:
Mg + AgNO₃ → Ag + Mg(NO₃)₂
Explanation:
A single replacement reaction is one in which an element gets replaced by another in a compound.
In the reaction
Mg + AgC→ Ag + Mg(NO₃)₂
Ag in AgNO₃ is replaced by Mg to give Mg(NO₃)₂.Only one element is getting replaced and hence it is a single replacement reaction.
A chemist reacted 0. 2 moles sodium benzoate with 0. 25 moles of hydrochloric acid. if she generated 22 g benzoic acid, the percent yield is 90%.
Reactant + HCl ------ Product
0.2 mol 0.25 22g
mol
Number of moles of reactant = 0.2mol
Molar mass of product = 122.12g
Number of moles of product = given mass/ molar mass
= 22g/ 122.12 g
= 0.180mol
Percent yield = (number of moles of product/ number of moles of reactant) × 100
= (0.180/0.2) × 100
= 90%
Thus we concluded that the percent yield of the given solution is 90%.
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360.18 K is the Kelvin temperature to which 10.0 L of a gas at 27 °C would have to be heated to change the volume to 12.0 L.
Explanation:
Data given:
Initial volume of the gas, V1 = 10 litres
Initial temperature of the gas, T1 = 27° C or 273.15+27 = 300.15 K
Final volume of the gas obtained, V2 = 12 Litres
final temperature to obtain the above volume, T2 =?
temperature value in Kelvin
Applying Charles' Law to the data given,
rearranging the equation to get T2,
T2 =
Putting the values in the equation:
T2 =
T2 = 360.18 K
The gas will be heated at the temperature of 360.18 K to get its volume changed to 12 litres.