Answer:
water is <u>polar </u>because oxygen is more electronegative than hydrogen
Explanation:
Water is polar covalent compound because of large electronegativity difference between oxygen and hydrogen. If the electronegativity difference is 0.4 or less than 0.4 the covalent compound will be non polar.
Covalent Compound:
It is formed by the sharing of electron pair between bonded atoms.
The atom with larger electronegativity attract the electron pair more towards it self and becomes partial negative while the other atom becomes partial positive.
For example:
In water the electronegativity of oxygen is 3.44 and hydrogen is 2.2. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and hydrogen becomes partial positive and water becomes polar.
It depends on the context iorn is a transition metal so it can hold a charge from 1-8
Answer:
![[Sr^{2+}]=5.66x10^{-4}M](https://tex.z-dn.net/?f=%5BSr%5E%7B2%2B%7D%5D%3D5.66x10%5E%7B-4%7DM)
Explanation:
Hello there!
In this case, given the solubility equilibrium of strontium sulfate:
Whose equilibrium expression is:
![Ksp=[Sr^{2+}][SO_4^{2-}]](https://tex.z-dn.net/?f=Ksp%3D%5BSr%5E%7B2%2B%7D%5D%5BSO_4%5E%7B2-%7D%5D)
In such a way, we can introduce the molar solubility, s, in the equation to obtain:
Then, we apply the square root to obtain:
Which is also the concentration of strontium ions:
Best regards!
Answer:
5.87%
Explanation:
Mass fraction of a solution is the ratio of mass of the solute to the total mass of the solution (Note that it is the total mass of the solution, i.e the sum of masses of solvent and solute). Mass percent is mass fraction times 100.
Here, the solute is KF and its mass is 59.1g. The solvent as usual is 
and its mass is 947g. Therefore, the total mass of the solution (solution is the mixture of solvent and solute, here KF and ) is 59.1 + 947 = 1006.1g.
The mass fraction is the ratio of mass of KF to the total mass of solution = 
.
Thus, the mass percent is mass fraction × 100 = 0.0587 × 100 = 5.87 %
