By adding heat to a test tube containing distilled water, amylase, and Benedict's Solution, what will...

By adding heat to a test tube containing distilled water, amylase, and Benedict's Solution, what will my final color of solution be? Does this test positive for reducing sugars? Why or why not?

Expert Solution

Answer:

Reducing sugars:

The sugars generally which can capable of acting as a reducing agents are called Reducing sugars. These sugars should have the free carbonyl group (Aldehyde or Keto).

All the Monosaccharides comes under this class.

Ex:

Benedicts test:

Simple sugars or reducing sugars can give the +Ve test.

For the +Ve test, The colour changes from the Clear blue to Brick red.

For Amylase:

It is the Non reducing sugar. It gives the -Ve test to the Benedicts solution. The blue colour of the reagent can not be changed.

The molecule is not having the free carbonyl groups. Hence it is the Non reducing sugar.

queen_honey_blossom answered 2 years ago

A shell-and-tube heat exchanger is to used to heat water (in the tube side) from 30...

A shell-and-tube heat exchanger is to used to heat water (in the tube side) from 30 deg C to 40 deg C at a mass flow rate of 4 kg/s. The fluid used for heating (shell side) is water entering at 90 deg C with a mass flow rate of 2 kg/s. A 1-2 STHE is used and the overall heat transfer coefficient based on the inside area is 1390 W/m2-K. The tubes are 1.875 in diameter (inside) and require...

Two streams containing a mixture of methanol and water are to be distilled in a distillation...

Two streams containing a mixture of methanol and water are to be distilled in a distillation column operating at 1 atm. The first stream enters the column closer to the top as a saturated liquid at 73 °C, with a flow rate of 55 kmol/h. The second stream enters the column at the temperature of 90°C closer to the bottom, with a flow rate of 40 kmol/h, at the concentration of 30 mol% methanol. The bottoms stream leaving the reboiler...

What is the mole fraction of water in a solution containing water and ethanol that is...

What is the mole fraction of water in a solution containing water and ethanol that is 470% water by mass?

If a mixture of water-ethanol containing a significant amount of methanol is being distilled (separation by...

If a mixture of water-ethanol containing a significant amount of methanol is being distilled (separation by VLE), can we state that the methanol is not a problem because it boils off first?

Heat transfer In a test in a double tube heat exchanger the following data are obtained...

Heat transfer In a test in a double tube heat exchanger the following data are obtained For hot fluid Flow = 11.6 gal / sec Outlet temperature = 30.1 ° C Inlet temperature = 32 ° C For cold fluid Flow 11gal / min Outlet temperature 25.1 ° C Inlet temperature 24.2 ° C For the fluid consider k = 0.49 w / mK cp = 3729.95 J / kgK Prandtl number = 14.29 Density = 1035.02kg / m3 Get:...

Heat transfer in a test in a double tube heat exchanger the following data are obtained...

Heat transfer in a test in a double tube heat exchanger the following data are obtained For hot fluid Flow = 11.6 gal / sec Outlet temperature = 30.1 ° C Inlet temperature = 32 ° C For cold fluid Flow 11gal / min Outlet temperature 25.1 ° C Inlet temperature 24.2 ° C For the fluid consider k = 0.49 w / mK cp = 3729.95 J / kgK Prandtl number = 14.29 Density = 1035.02kg / m3 Get:...

A water-to-water system is used to test the effects of changing tube length, baffle spacing, tube...

A water-to-water system is used to test the effects of changing tube length, baffle spacing, tube pitch, pitch layout, and tube diameter. Cold water at 25°C and 100,000 kg/hr is heated by hot water at 100°C , also at 100,000 kg/hr. The exchanger has a 31 in. ID shell. Perform calculations on this 1–2 shell-and-tube heat exchanger for the following conditions, as outlined in the examples, and put together an overall comparison chart. a. 3/4 in. OD tubes, 12 BWG...

Convection Heat transfer internal flow Consider water flowing in a heated tube. The tube is 14...

Convection Heat transfer internal flow Consider water flowing in a heated tube. The tube is 14 m long with an inner diameter of 1 cm. The heat is added at 1500 W/m2 uniformly along the tube. Water flows at 0.3 m/s. Use the following water property ? = 1000 kg/m3, ? = 1.4 × 10?3 kg/m·s, cp = 4.2 kJ/kg·K, k = 0.58 W/m·K, and determine 1. Heat transfer coefficient at the tube exit. 2. Tube surface temperature at the...

What is the osmolarity of distilled water? what is the osmolarity of 40mM CaCl2? Is it...

What is the osmolarity of distilled water? what is the osmolarity of 40mM CaCl2? Is it hypertonic, isotonic or hypotonic?

Design a concentric tube heat exchanger (in co-current configuration) to heat 1000 cm3/ min of water...

Design a concentric tube heat exchanger (in co-current configuration) to heat 1000 cm3/ min of water from 30oC to 45oC flowing in the shell, using water at 65oC flowing in the tube. The heating water should not exit with temperature above 55oC. Choose a suitable range of inner pipe (copper material) diameters for heat exchanger, assume suitable inner tube thickness and outer tube diameter and show selection of parameters and dimensions for an optimum design.

Question