In a lab that I am doing I am having difficulty in determining this:
What are two indications that suggest a reaction has taken place when HCI was added to Mg?
In this lab I am taking 0.1 Mg and adding it to the flask, then recording the temperature of the Mg which is (21 C). Then I am adding 10ml of ^ m HCI to the flask.
On this question, How could I write a balanced equation for the reaction of Mg with HCI.
I don't know if I have given information to write an equation, please let me know.
The reaction is
Mg + 2HCl ==> MgCl2 + H2
You know a reaction has occurred because bubbles of gas appear. I assume the temperature measurement is to see that the temperature rises during the reaction. That would be two indications that a reaction has occurred.
To determine if a reaction has taken place when HCl is added to Mg, you can look for two indications:
1. Formation of gas: When HCl reacts with Mg, it produces hydrogen gas (H2). So, if you observe the formation of gas bubbles or effervescence in the flask when HCl is added to Mg, it suggests that a reaction has occurred.
2. Temperature change: When a chemical reaction occurs, it often involves energy changes. In the case of the reaction between HCl and Mg, it is an exothermic reaction, meaning it releases heat energy. If you measure the temperature of the Mg before and after adding HCl, and notice a significant increase in temperature, it indicates that a reaction has taken place.
To write a balanced equation for the reaction between Mg and HCl, we first need to know the chemical formula of Mg and HCl:
- Mg is the symbol for magnesium, which has a charge of +2.
- HCl is the formula for hydrochloric acid, which dissociates into hydrogen ions (H+) and chloride ions (Cl-).
The balanced equation for the reaction between Mg and HCl is as follows:
Mg + 2HCl -> MgCl2 + H2
In this equation, one magnesium atom reacts with two hydrochloric acid molecules to produce one molecule of magnesium chloride (MgCl2) and one molecule of hydrogen gas (H2).