Question

in a laboratory, nakisha mixes a sodium hydroxide solution with an indicator called phenolphthalein. when combined, they create a pink solution. nakisha wonders if mixing other solutions with phenolphthalein will also create this pink color. how could nakisha use the scientific inquiry process to determine whether mixing other solutions with phenolphthalein will also create a pink color? check all that apply. by making qualitative observations about the sodium hydroxide and phenolphthalein in solution by asking a classmate if sodium hydroxide turns pink when mixed with other solutions by comparing the given solution to other familiar solutions containing phenolphthalein by designing an experiment to test phenolphthalein with other solutions by repeating the experiment at different temperatures

Explanation:

• Option 1: Qualitative observations (like color change) help understand the reaction, but it doesn't test other solutions. Not sufficient alone.
• Option 2: Asking a classmate gives anecdotal info, not scientific data.
• Option 3: Comparing with known phenolphthalein - containing solutions (like NaOH - phenolphthalein) can show if other solutions react similarly to produce pink. Valid.
• Option 4: Designing an experiment to mix phenolphthalein with other solutions directly tests if they create pink. Valid.
• Option 5: Repeating at different temps tests temperature's effect, not if other solutions create pink. Irrelevant.

So the valid options are the third (by comparing the given solution to other familiar solutions containing phenolphthalein) and fourth (by designing an experiment to test phenolphthalein with other solutions).

Answer:

• by comparing the given solution to other familiar solutions containing phenolphthalein
• by designing an experiment to test phenolphthalein with other solutions