To determine the state symbol for water (H₂O) in the given chemical reaction, we need to consider the conditions under which the reaction typically occurs.
The reaction provided is:
[tex]\[ CaCO_3(s) + 2HCl(aq) \rightarrow CaCl_2(aq) + CO_2(g) + H_2O(x) \][/tex]
Let's examine the possible state symbols for H₂O:
1. (aq): This symbol denotes an aqueous solution, meaning the substance is dissolved in water. This is not appropriate for H₂O itself, as water cannot dissolve in itself.
2. (g): This symbol denotes a gaseous state. However, water in the gaseous state would imply it is steam. In chemical reactions like this one, water is usually not a product in the gaseous form unless specified by certain conditions like high temperature.
3. (l): This symbol denotes a liquid state. Water at room temperature and standard pressure is a liquid, which is the most common state for water produced in typical laboratory reactions.
4. (s): This symbol denotes a solid state. Water only exists in the solid state (ice) at temperatures below 0°C, which is not the norm for this type of reaction unless specific freezing conditions are applied.
Given the general conditions under which such reactions are performed, H₂O is produced as liquid water. Therefore, the correct state symbol [tex]\( (x) \)[/tex] for H₂O in the equation is:
[tex]\[ (l) \][/tex]
Thus, the appropriate answer is:
(c) (l)
So you should tick (✓) the box next to (c):
[tex]\[ \checkmark \text{(l)} \][/tex]
