Slaked lime, often known as calcium hydroxide, is an inorganic substance having the chemical formula Ca(OH)2. When water is combined with quicklime (calcium oxide), a colorless crystal or white powder is created.
Step:-1,(a (OH)₂ →) (9²+ (aq) +201 (az)-5 of C₂₂ (01) ₂ = 1.35 x 10²5 m0
OH = 2 X Concentration of Ca(OH)₂
Concentration of = 2 X 1.35 X 105 m
Step 2- pOH = -log [OH-]=2= 2.7x 10 log [2.7 x 105]- log 3.7 - (-5) log 2.7 + 5×1
0.9313 +5
5.4313
stepз- PH +poH =14
рн = 14-рон
= 14-5.4313
=8.5687
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Answer:
sorry i couldn't think of a fifth one
Explanation:
There are four main types of air pollution sources: mobile sources – such as cars, buses, planes, trucks, and trains. stationary sources – such as power plants, oil refineries, industrial facilities, and factories. area sources – such as agricultural areas, cities, and wood burning fireplaces.
Answer:
false all producers are at the top of food web
Answer:
i think it's hydrogen reacts to oxygen
Answer : The enthalpy change for dissolving this salt on a energy per mass basis is 132.4 J/g
Explanation :
Heat released by the reaction = Heat absorbed by the calorimeter + Heat absorbed by the water
![q=[q_1+q_2]](https://tex.z-dn.net/?f=q%3D%5Bq_1%2Bq_2%5D)
![q=[c_1\times \Delta T+m_2\times c_2\times \Delta T]](https://tex.z-dn.net/?f=q%3D%5Bc_1%5Ctimes%20%5CDelta%20T%2Bm_2%5Ctimes%20c_2%5Ctimes%20%5CDelta%20T%5D)
where,
q = heat released by the reaction
= heat absorbed by the calorimeter
= heat absorbed by the water
= specific heat of calorimeter = 
= specific heat of water = 
= mass of water = 
= change in temperature = 
Now put all the given values in the above formula, we get:
![q=[(42.2J/^oC\times 0.93^oC)+(75.0g\times 4.184J/g^oC\times 0.93^oC)]](https://tex.z-dn.net/?f=q%3D%5B%2842.2J%2F%5EoC%5Ctimes%200.93%5EoC%29%2B%2875.0g%5Ctimes%204.184J%2Fg%5EoC%5Ctimes%200.93%5EoC%29%5D)
Now we have to calculate the enthalpy change for dissolving this salt on a energy per mass basis.
where,
= enthalpy change = ?
q = heat released = 331.08 J
m = mass of salt = 2.50 g
Therefore, the enthalpy change for dissolving this salt on a energy per mass basis is 132.4 J/g
