investigations were carried out in a science lab to explore the topic of chemical and physical changes…

investigations were carried out in a science lab to explore the topic of chemical and physical changes. investigation a step 1. add 5 tsp. salt to 100 ml warm water and stir until most or all of the salt is no longer visible. step 2. heat the salt solution on a burner until only a white solid remains. investigation b step 1. mix 10 tsp. white sugar into 100 ml water and stir until most or all of the sugar is no longer visible. step 2. heat the sugar solution on a burner until the solution thickens and turns brown. in which step(s) did a chemical change most likely occur? investigation a, step 1 and investigation b, step 1 investigation a, step 2 and investigation b, step 2 investigation a, step 2 only investigation b, step 2 only

investigations were carried out in a science lab to explore the topic of chemical and physical changes. investigation a step 1. add 5 tsp. salt to 100 ml warm water and stir until most or all of the salt is no longer visible. step 2. heat the salt solution on a burner until only a white solid remains. investigation b step 1. mix 10 tsp. white sugar into 100 ml water and stir until most or all of the sugar is no longer visible. step 2. heat the sugar solution on a burner until the solution thickens and turns brown. in which step(s) did a chemical change most likely occur? investigation a, step 1 and investigation b, step 1 investigation a, step 2 and investigation b, step 2 investigation a, step 2 only investigation b, step 2 only

Answer

Explanation:

Step1: Comprender los cambios físicos y químicos

Un cambio físico no altera la identidad química de una sustancia, mientras que un cambio químico produce una nueva sustancia con propiedades químicas diferentes.

Step2: Analizar Investigación A

En el Paso 1 de Investigación A, la sal se disuelve en agua. Esto es un cambio físico ya que la sal y el agua mantienen sus propiedades químicas. En el Paso 2, al evaporar el agua, solo se recupera la sal, un cambio físico.

Step3: Analizar Investigación B

En el Paso 1 de Investigación B, el azúcar se disuelve en agua, un cambio físico. En el Paso 2, al calentar la solución de azúcar hasta que espesa y se vuelve marrón, se forma caramel. Esto es un cambio químico porque se produce una nueva sustancia con propiedades químicas diferentes.

Answer:

Investigation B, Step 2 only