Limescale That Builds Up in Showers,kettles,and Pipes Is Often Primarily $\to$

question 152

Multiple Choice

Limescale that builds up in showers,kettles,and pipes is often primarily composed of calcium carbonate.One limescale remover contains sulfamic acid (H₃NSO₃) ,which can be considered to be a strong monoprotic acid.Which reaction summarizes the action of sulfamic acid on limescale?

• A)H⁺(aq)+ H₂NSO₃^-(aq)+ CaCO₃(s)\(\to\) HCO₃^-(aq)+ HNSO₃^2-(aq)+ Ca⁺(aq)
• B)3 H⁺(aq)+ NSO₃^-(aq)+ CaCO₃(s)\(\to\) Ca²⁺(aq)+ HSO₃^-(aq)+ NO₂(g)+ CO₂(g)+ H₂O( )
• C)2 H⁺(aq)+ 2 H₂NSO₃^-(aq)+ CaCO₃(s)\(\to\) CO₂(g)+ 2 H₂NSO₃^-(aq)+ Ca²⁺(aq)+ H₂O( )
• D)3 H⁺(aq)+ NSO₃^3-(aq)+ CaCO₃(s)\(\to\) Ca²⁺(aq)+ NSO₃^3-(aq)+ CO₂(g)+ 3 HNO₂(aq)
• E)3 H⁺(aq)+ NSO₃^- (aq)+ CaCO₃(s)\(\to\) CaS(s)+ HCN(g)+ 3 H₂O( )

---

Definitions:

Planning Budget

A budget prepared for a specific level of activity, used for planning and coordinating the financial resources of a company.

Activity Level

Refers to the volume of production or operations, often influencing costs and managerial decisions within a business.

Selling And Administrative Expenses

Expenses related to the selling of products or services and the general administration of a business, not including manufacturing costs.

Planning Budget

A budget designed for planning and strategic purposes, outlining expected revenues, expenses, and other financial activities.