Which of the following statements is wrong? ! a. in volumetric analysis, the volume of standard solution required to react completely with analyte is measured b. a standard solution is the one of very well-known concentration of a substance c. a primary standard material must be hygroscopic, and of high purity d. at equivalence point of acid-base titration, the indicator changes color e. solid naoh is not a suitable primary standard

•what conclusions can you make about the relationship between the volume of a gas and its temperature? • what conclusions can you make about the relationship between the volume of a gas and its pressure? • what possible variables have you not accounted for? as you did the procedures, is it possible that the atmospheric pressure may have changed? if it did change over the course of your experiment, then how would your results have been affected?