Qs 1. Find the sine of the angle between the vectors A vector=3i-4j+5k & B vector=-2i+j-2k.

Qs 2. Which will have greater solublity & why? Fe(OH)2 or Fe(OH)3?

Qs 1. Find the sine of the angle between the vectors A vector=3i-4j+5k & B vector=-2i+j-2k.

Qs 2. Which will have greater solublity & why? Fe(OH)2 or Fe(OH)3?

**To solve Qs 1., use the following formula.**

For two vectors A and B,

||A⃗ ×B⃗ ||= |A⃗ | | B⃗ |sin(θ)

**Qs 2**

In water the solubility can be seen as.

Ksp value is found

Fe(OH)2 is more soluble in water than Fe(OH)3 because its Ksp is 22 orders of magnitude (1022 !) larger.

Please note that Ksp value is the “Solubility Product Constant” and this has been found experimentally, and is available online for reference.