Question

identify the key properties of seawater that make it unique.
key
properties
of
seawater
it is salty
it has a freezing point of 0°c
it is slightly acidic
it has a lower freezing point than fresh water
its density is slightly higher
objects tend to sink easier than fresh water
its electrical conductivity is much higher
it is slightly basic

Explanation:

• Seawater is salty due to dissolved salts like sodium chloride.
• It has a lower freezing point (around -2°C for average seawater) than fresh water (0°C), so "it has a freezing point of 0°C" is incorrect.
• Seawater is slightly basic (pH around 8.1), not acidic.
• Its density (about 1.025 g/cm³) is higher than fresh water (1 g/cm³), so objects float more easily (not sink easier) as per Archimedes' principle (\(F_b=

ho Vg\), higher \(
ho\) (density of fluid) means more buoyant force for same \(V\)).

• The dissolved salts make its electrical conductivity much higher as ions carry electric current.

Answer:

• It is salty: \(\square\) (should be checked as it's a key property)
• It has a freezing point of \(0^{\circ}C\): \(\square\) (incorrect, not checked)
• It is slightly acidic: \(\square\) (incorrect, not checked)
• It has a lower freezing point than fresh water: \(\square\) (should be checked)
• Its density is slightly higher: \(\square\) (should be checked)
• Objects tend to sink easier than fresh water: \(\square\) (incorrect, not checked)
• Its electrical conductivity is much higher: \(\square\) (should be checked)
• It is slightly basic: \(\square\) (should be checked)