Use what you know about valence structure to predict how chlorine will bond with Silicon. E.C. What shape do you predict this molecule will take? Draw this molecule.
Use what you know about electronegativity to predict the relative strength of the bond between Ca (Calcium Oxide) and NiO (Nickel II Oxide). Which is stronger and how can you predict this?
0.8 Molar NaOH is added to 30 mL of HCI and the volume of base added vs. pH is graphed. What molarity is the HCI solution?
Chlorine has 7 valence electrons and Silicon has 4 valence electrons. Chlorine needs only one electron to achieve a stable octet, so it is expected to form a single covalent bond with Silicon. This results in each atom having a complete outer shell electron configuration.
The molecule formed from chlorine bonding with silicon is known as silicon tetrachloride (SiCl4). The shape of this molecule is tetrahedral, with the chlorine atoms positioned at the four corners of the tetrahedron around the central silicon atom.
As for the bond strength between CaO and NiO, we can use electronegativity to predict the relative strength. Electronegativity is a measure of an atom's ability to attract electrons in a chemical bond.
Calcium (Ca) has an electronegativity of 1.00, while Oxygen (O) has an electronegativity of 3.44. Nickel (Ni) has an electronegativity of 1.91. Since the difference in electronegativity between Ca and O is larger than between Ni and O, the bond between Ca and O in CaO is expected to be stronger than the bond between Ni and O in NiO.
To determine the molarity of the HCl solution, we would need more information. The graph of the volume of base added vs. pH can tell us about the acidity or basicity of the solution, but it doesn't directly provide information about the concentration (molarity) of the HCl solution.