Your above answer is a bit misleading. When it dissolves in water, it produces positive hydrogen ions and negative chloride ions (Cl-). Write. Dissolving salt in water is a commonly used example of a physical change, but when you dissolve salt (NaCl) in water (H 2 O), you get sodium ions (Na+) and chlorine ions (Cl-) mixed with the water (H 2 O). Post questions, jokes, memes, and discussions. bonds being made and broken) it's a physical change.I just always ask myself "Is the compound being changed into another compound?" Chemical. Solubility, the term, is also treated as a physical property in Chemistry; 2019 (Fay, McMurry, Robinson). Physical change. This tells us that hydrochloric acid and sodium hydroxide never form spontaneously from sodium and chloride in aqueous solution. A characteristic that can be observed without changing the chemical composition. So no, I haven't heard of this being on the MCAT. How does Charle's law relate to breathing? Thus, any ionic compound that is soluble in water would experience a chemical … The MCAT (Medical College Admission Test) is offered by the AAMC and is a required exam for admission to medical schools in the USA and Canada. Milk sours. pamela_nagurka. I enjoy stack exchange far too much, but whatevs, it's super useful. The dielectric constant $\epsilon_r$ of water is 80 compared with 1 for air. No chemical bonds were broken. So I think on the whole it's best to think of it as a physical process that is right on the line of a chemical process. Because, it's a reversible process. Salt will just dissolve in water and no chemical reaction occurs, because water molecule is very polar and it pull outs the sodium and chlorine ions and when its fully dissolve the water and salt solution will full of sodium and chlorine ions. The reactant (sodium chloride or NaCl) is different from the products (sodium cation and chlorine anion). Gravity. Sugar dissolves in water. It can also be considered a change of state. The reactant (sodium chloride, or NaCl) is different from the products (sodium cation and chlorine anion). It just breaks the ionic NaCl attraction into Na+ and Cl- ions. it's both a chemical and physical process: first, it's a physical process, Chlorine dissolved into water is just the way the Cl2 molecule goes into between many other water molecules, staying stable and making a system of Cl2 and H2O. Why is dissolving NaCl a physical change? In the case of sodium chloride ($$\text{NaCl}$$) for example, the positive sodium ions ($$\text{Na}^{+}$$) are attracted to the negative pole of the water molecule, while the negative chloride ions ($$\text{Cl}^{-}$$) are attracted to the positive pole of the water molecule. The reactant (sodium chloride or NaCl) differs from the products (sodium and chloride ions), so a chemical change occurs. Thus, any ionic compound that is soluble in water would experience a chemical change. NaCl (Table Salt) dissolves in water. Ag (Silver) tarnishes. It is a physical change. C 2. Physical change. It is not a chemical change because no new chemical bonds are formed. When some substances are dissolved in water, they undergo either a physical or a chemical change that yields ions in solution. When CuSO4 (copper sulfate) dissolves in H20 (water) you still have copper sulfate and water, so there is no chemical reaction. Answer: salt dissolving in water is usually considered to be a physical change, however the chemical species in salt solution (hydrated sodium and chlorine ions) are different from the species in solid salt. Identify the following as physical (P) or chemical (C) changes. You will have copper and sulfate ions, but if you boil the solution and catch the steam, you will end up with copper sulfate and water. That indicates a chemical change. The reactant (sodium chloride, or NaCl) is different from the products (sodium cation and chlorine anion). 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