Other Chemistry Answers

What is the mass of hydrochloric acid which reacts with 150 g of Zinc, which has a 95% Purity.

A student was tasked to perform gravimetric analysis of a soluble sulfate. His unknown sample weighed 0.7543 g. The sample underwent precipitation using BaCl2 and was digested for overnight. The precipitate was then filtered off to obtain white crystalline precipitate that was collected in an ash less filter paper. In performing constant weighing, he obtained a crucible mass that is 29.9442 g. After burning his samples inside the crucible, the obtained mass was 30.3375 g. Compute for the experimental mass (g) of SO3 in grams obtained by the student

A solution has a [OH–] of 2.5 x 10–7M, what colour would it be if it was mixed with the indicator phenol red?

Calculate the pKa and Ka of the indicator Orange IV.

Indicator - Thymol Blue, Phenol Red, Alizarin Yellow

Colour Observed - Blue, Red, Yellow


Select two indicators that, when combined, will produce a solution which is yellow at pH 3.0, green at pH 5.8, and blue at pH 10.0.

Indicator - Thymol Blue, Phenol Red, Alizarin Yellow

Colour Observed - Blue, Red, Yellow


A solution of unknown [H3O+] is mixed several indicators and the results are shown: What is the approximate pH range of the solution?

Find the pH of a green solution of bromcresol green.

What would be the pressure of a gas, at 101.3 kPa, if the temperature is lowered from 368 K to 358 K?

The specific heat capacity of water is 4.18 J/(g °C). In a cup, 100 grams of water was put in the microwave to heat it from a temperature of 25 °C, to right at boiling temperature. What is the enthalpy of this water?

62.6 g of an unknown metal is found to release -827.3 J of energy while its temperature decreases from 132.9 °C to 36.7 °C. What is the specific heat of this metal? Use 3 decimal places.