Is dissolving NaCl a physical or chemical change?

Is dissolving NaCl a physical or chemical change?

Dissolving a solid in liquid, such as table salt in water, is a physical change because only the state of the matter has changed. Physical changes can often be reversed. Allowing the water to evaporate will return the salt to a solid state.

Is melting of wax a chemical change or physical change?

The process of a solid becoming a liquid is called melting. Melting of wax, by itself, involves a change of state from solid to liquid. When the physical state of a substance changes, no new products are formed. Hence, melting of wax is physical change and the correct answer is option A.

Why is dissolving NaCl a physical change?

It is a physical change. When the NaCl dissolves, the Na and Cl ions do break apart. It is not a chemical change because no new chemical bonds are formed. It can also be considered a change of state.

Is salt melting ice a chemical or physical change?

The melting of ice is a physical change when it occurs naturally. But when you speed up the process by using a reactant, such as salt, it becomes a chemical reaction.

What type of change is melting of wax?

physical change
On heating, candle wax melts and form liquid wax. It is a physical change. Since it again turns into solid wax on cooling. This is a reversible change.

Is melting salt a chemical change?

Therefore, dissolving salt in water is a chemical change. The reactant (sodium chloride, or NaCl) is different from the products (sodium cation and chlorine anion). In contrast, dissolving a covalent compound like sugar does not result in a chemical reaction.

Why is dissolving a chemical change?

Why Dissolving Salt Is a Chemical Change When salt dissolves, the ionic bonds between the atoms break. The reactant (sodium chloride or NaCl) differs from the products (sodium and chloride ions), so a chemical change occurs.

Is melting physical change?

Melting is an example of a physical change . A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not. The melted ice cube may be refrozen, so melting is a reversible physical change.

How is wax melting a chemical or a physical change?

Melting of wax, by itself, involves a change of state from solid to liquid. When the physical state of a substance changes, no new products are formed. Hence, it is a physical change.

Which is a chemical change when salt dissolves in water?

Therefore, dissolving salt in water is a chemical change. The reactant (sodium chloride, or NaCl) is different from the products (sodium cation and chlorine anion). Thus, any ionic compound that is soluble in water would experience a chemical change.

What happens when I Melt N A C L?

If I melt N a C l, I get a molten salt. This means a liquid formed only by ions ( C l X − and N a X + ). That could mean that the crystal N a C l experimented a chemical change: Like a chemical reaction… The ions have now more space to move and interact with much more ions than in the solid phase.

Which is an example of a chemical change?

Therefore, dissolving salt in water is an example of a chemical change. The reactant (sodium chloride or NaCl) is different from the products (sodium cation and chlorine anion). Thus, any ionic compound that is soluble in water would experience a chemical change.