When a hydrometer is dipped n a liquid, the reading is found to be 1.25. What is the density of the liquid? (2024)

FAQs

How to calculate density with a hydrometer? ›

The hydrometer is immersed into the sample liquid until it floats, and the density reading is taken by looking at the scale, where the level of the sample liquid aligns with a marking on the hydrometer scale.

The correct Answer is:The liquid surface will be below the marking of 1. Step by step video, text & image solution for Suppose the hydrometer is dipped in a liquid of density greater than that of water.

The hydrometer will float slightly higher in salt water because salt water is more dense that “pure” water. It is important to understand that salinity and specific gravity are related – but not the same.

The liquid to test is poured into a tall container, often a graduated cylinder, and the hydrometer is gently lowered into the liquid until it floats freely. The point at which the surface of the liquid touches the stem of the hydrometer correlates to relative density.

The density of an object can be calculated using the equation density = mass / volume. This calculation gives a numerical value which describes the amount of mass that is confined within a specific volume of an object.

In the standard hydrometer scale, known as the specific gravity scale, distilled water equals 1.000, the initial point of measurement. Liquids lighter than water are scaled below 1.000 specific gravity, and liquids heavier than water are scaled above 1.000 specific gravity.

If a fluid is less dense, the hydrometer will need to displace more fluid to reach the balancing point between upward and downward force, so it sinks deeper into the fluid. If the fluid is more dense, such as the salt-water solution, the volume the hydrometer needs to displace will be less, so it floats higher.

The hydrometer operates on Archimedes Principle. Archimedes discovered that when a body, which is lighter than a fluid is placed in that fluid, the fluid displaced by the body will be equal to the volume of the body. This principle is also known as buoyancy.

To calculate the buoyant force we can use the equation: F b = ρ V g where Fb is the buoyant force in Newtons, is the density of the fluid in kilograms per cubic meter, V is the volume of displaced fluid in cubic meters, and g is the acceleration due to gravity.

Assertion :Weight of solid in air is W and in water is T=2W3 Then relative density of solid is 3.0. Reason: Relative density of any solid is given by RD=Weight in airChange in weight in water.

What does a hydrometer measure in Quizlet? ›

A hydrometer is an instrument designed to measure the density of a liquid.

Calculate the density of the salt solution using the volumetric flask measurement. Divide the mass of the solution by the volume of the solution. Thus, the density of the salt solution is 1.053 g/mL.

It can be approximated as: ΔDensity = α*ΔT+β*ΔS α and β are coefficients of thermal expansion and saline contraction. α is roughly 0.2 kg m-3 °C-1 β is roughly 1 kg m-3 psu-1 These values are where the 15°C and 3 psu come from. In the ocean, α and β also depend on salinity, temperature, and pressure.

A Hydrometer is a device for measuring Relative Density. A hygrometer is weather instrument used to measure the amount of humidity in the atmosphere. Lactometer is used to measure purity of milk.

A Milk Hydrometer also known as a lactometer is an instrument that is used to check for the purity of milk by measuring its density. Milk of given fat % content can have density within a certain fixed range. A lactometer consists of a cylindrical graduated tube closed at both ends.

Most of the time, a 50-ml density bottle is used in the test [IS: 2720 Part 2]. At 105 to 110°C, the density bottle is cleaned, dried, and then cooled. The weight of the bottle and the weight of the cap is measured. About 5 to 10 grams of oven-dried soil samples are transferred in the bottle and weighed.