1.1 Water as a transport system

Question 1

Why are water molecules dipolar?

Answer 1

Electrons are unevenly distributed in molecule becuase oxygen is much more electronegative than hydrogen (hogs the negative electrons

Question 2

What is the charge of the single oxygen particle in a water molecule?

Answer 2

𝜹- (Partially negative)

Question 3

What is the charge of the hydrogen particles in a water molecule?

Answer 3

𝜹+ (partially positive)

Question 3

What type of bonds are present between water molecules / how are they represented.

Answer 3

Hydrogen bonds / With a dashed line

Question 4

What causes the hydrogen bonding between water molecules

Answer 4

Their dipolarity - The slightly negative oxygen atoms will be attracted to the slightly positive hydrogen atoms.

Question 5

Which is stronger - a covalent or hydrogen bond?

Answer 5

A covalent bond

Question 6

Which type of substances dissolve easily in water and why?

Answer 6

Ionic substances becuase the positively charged atoms are attracted to the (slightly) netatively charged oxygen atoms v.v

Question 7

What are substances that are attracted to water molecules known as? + example

Answer 7

Hydrophilic (water loving)
(Glucose)

Question 8

What are substances that are repelled from water molecules know as? + example

Answer 8

Hydrophobic (non-polar)
(fats)