Acidic solutions have pH values less than 7. Stomach acid turns universal indicator paper a strong red colour. This indicates a pH value of 0, the strongest value of acid. Alkaline solutions have ...

This educational film explores acid-base indicators and their color changes in response to acidity. It demonstrates how substances like tea, red cabbage, and litmus paper react when acids are ...

Abstract: This paper examines the empirical evidence on currency crisis and propopses a specific early warning system. This system involves monitoring the evolution of several indicators that tend to ...

Abstract: This paper examines episodes of banking system distress and crisis in a large sample of countries to identify which macroeconomic and financial variables can be useful leading indicators.