Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. Which of the following colours will be indicated by the pH paper?a. Redb. Yellowc. Greend. Blue
Question
Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. Which of the following colours will be indicated by the pH paper?a. Redb. Yellowc. Greend. Blue
Solution 1
To determine the color indicated by the pH paper, we need to understand the reaction that occurs when hydrochloric acid (HCl) and sodium hydroxide (NaOH) are mixed.
When HCl and NaOH react, they undergo a neutralization reaction, resulting in the formation of water (H2O) and sodium chloride (NaCl). The pH of the resulting solution will be neutral, which means it will have a pH of 7.
pH paper is typically designed to change color based on the acidity or alkalinity of a solution. In this case, since the resulting solution is neutral with a pH of 7, the pH paper will indicate a color that corresponds to neutrality.
Based on the given options, the color that represents neutrality is "Green" (option c). Therefore, the pH paper will indicate the color green when equal volumes of hydrochloric acid and sodium hydroxide solutions of the same concentration are mixed.
Solution 2
To determine the color indicated by the pH paper, we need to understand the reaction that occurs when hydrochloric acid (HCl) and sodium hydroxide (NaOH) are mixed.
When HCl and NaOH react, they undergo a neutralization reaction, resulting in the formation of water (H2O) and sodium chloride (NaCl). The pH of the resulting solution will be neutral, which means it will have a pH of 7.
pH paper is typically designed to change color based on the acidity or alkalinity of a solution. In this case, since the resulting solution is neutral with a pH of 7, the pH paper will indicate a color that corresponds to neutrality.
Based on the given options, the color that represents neutrality is "Green" (option c). Therefore, the pH paper will indicate the color green when equal volumes of hydrochloric acid and sodium hydroxide solutions of the same concentration are mixed.
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