Mole of sodium hydroxide reacts with one. Calculate the concentration of the hydrochloric acid.
[tex]NaCl + HCl[/tex]
Why did the temperature of the mixture fall after the maximum temperature had been reached?
Answer (2)
The concentration of hydrochloric acid (HCl) is 1 M, calculated using the reaction with 1 mole of sodium hydroxide (NaOH). The temperature of the mixture falls after reaching a maximum due to the release of heat during the reaction and the dissipation of that heat into the surrounding environment once the reaction ceases. Additional factors like dilution can also contribute to the temperature drop.
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The reaction between NaOH and HCl is 1:1.
Assume 1 mole of NaOH reacts with 1 liter of HCl.
Calculate the concentration of HCl using the formula: C o n ce n t r a t i o n = V o l u m e M o l es .
The concentration of the hydrochloric acid is 1 M .
Explanation
Problem Analysis Let's analyze the problem. The question is incomplete as it does not provide the number of moles of sodium hydroxide (NaOH) used in the reaction, nor does it specify the volume of hydrochloric acid (HCl). However, it states that 'mole of sodium hydroxide reacts with one' which we will interpret as 1 mole of NaOH reacting with 1 liter of HCl. We are asked to calculate the concentration of the hydrochloric acid.
Balanced Chemical Equation The reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl) is a neutralization reaction, represented by the following balanced chemical equation: N a O H + H Cl → N a Cl + H 2 O From the balanced equation, we can see that the reaction between NaOH and HCl is 1:1. This means that 1 mole of NaOH reacts with 1 mole of HCl.
Calculating Concentration Given that we are assuming 1 mole of NaOH reacts with 1 liter of HCl, we can calculate the concentration of HCl using the formula: C o n ce n t r a t i o n = V o l u m e M o l es Where:
Moles of HCl = Moles of NaOH = 1 mole
Volume of HCl = 1 liter
Final Calculation Substituting the values into the formula: C o n ce n t r a t i o n H Cl = 1 l i t er 1 m o l e = 1 M Therefore, the concentration of the hydrochloric acid is 1 M (Molar).
Conclusion The concentration of the hydrochloric acid is 1 M.
Examples
In a titration experiment, you might use the concentration of a known solution (like NaOH) to determine the concentration of an unknown solution (like HCl). This is crucial in many chemical analyses, such as determining the amount of acid in a sample of vinegar or the amount of base in an antacid tablet. By carefully measuring the volumes of the reacting solutions, you can accurately calculate the unknown concentration using the principles of stoichiometry and the balanced chemical equation.
