How much sodium hydroxide is required to make 250 cm...
How much sodium hydroxide is required to make 250 cm3 of 0.1 molar solution? Na=23; 0=16; H=1]
10.0 g
4.0g
2.0 g
1.0g
0.1 g
Correct answer is D
no of moles of Na = molar concentration X volume
= 0.1 x 2501000 = 0.025
no of moles = mM
mass = no of mles x molar mass = 0.025 x 40 = 1.0g ( molar mass of NaOH = 40g/mol)
What is the solubility product constant (Ksp) used for? ...
The above orbital diagram shown the electronic configuration of ...
Which of the following substances is a non-reducing sugar? ...
In the industrial production of H2 from water gas the CO2 produced along with the H2&...
What is the pH of 0.001 mol dm-3 solution of sodium hydroxide ...
The gas formed when ammonium trioxonitrate (V) is heated with sodium hydroxide is? ...
The processes which return carbon (IV) oxide to the atmosphere include ...