Phenolphthalein turns from pink to colorless in a basic solution.
Which of the following is a characteristic of a base?
What is the role of a stationary phase in chromatography?
The Lewis structure for a water (H2O) molecule shows:
Which molecule has a linear shape due to the absence of lone pairs on the central atom?
The bond angle in a molecule with a linear shape is:
Which term describes the ability of an analytical method to detect small changes in analyte concentration?
The VSEPR theory is used to predict:
Which of the following is a transition metal?
What is the pH range of neutral solutions?
The Lewis structure for a nitrogen trifluoride (NF3) molecule shows: